Opinion by Judge SHUBB; Dissent by Judge KOZINSKI.

The State of Idaho appeals from the judgment of the district court dismissing the criminal case against FBI Special Agent Lon Horiuchi. See Fed.R.Crim.P. 12(b). The criminal complaint, charging Horiuchi with the crime of involuntary manslaughter, was initially filed in Idaho state court. Specifically, the complaint alleged that Horiuchi:

Horiuchi removed the prosecution to federal court pursuant to 28 U.S.C. § 1442 (a)(1). The district court dismissed the charge on the ground that the Supremacy Clause 1 protected Horiuchi from prosecution because the criminal case sought to punish Horiuchi for actions taken in pursuit of his duties as a federal law enforcement officer. We affirm.

FACTUAL BACKGROUND

On August 21, 1992, there was an outstanding warrant for Randall Weaver, Vicki Weaver’s husband, based on weapons trafficking charges. On August 21, 1992, *989 several federal agents (Horiuchi not among them) went to serve the warrant at the Weaver Ranch at Caribou Ridge (a.k.a. “Ruby Ridge”). The agents encountered Randall Weaver, his teenage son Sammy, and friend Kevin Harris on the road leading to the ranch. A gun battle erupted during the encounter. Deputy Marshal Degan was shot and killed, as was Sammy Weaver. 2 The federal agents did not know that Sammy was killed. Randall Weaver and Kevin Harris retreated to the ranch with Sammy’s body and placed it in the birthing shed, a structure on the Weaver property. 3

That same day, the F.B.I. dispatched a response force to the area, including the Hostage Rescue Team to which Horiuchi belonged as a sniper. Horiuchi was a highly trained marksman qualified to hit a quarter of an inch target at 220 yards. He was also trained to hit a moving target. Upon arrival, Horiuchi was briefed. According to Horiuchfs trial testimony, the briefings included, among other things, that Deputy U.S. Marshal Degan had been shot and killed during a fire fight near the Weaver residence; that during the fire fight, the Marshals were pinned by indiscriminate fire; that either Harris, Randall Weaver or Vicki Weaver was involved in the shooting of Deputy Degan; that Randall Weaver had been in the military attached to a special forces unit; that the individuals in the cabin had a habit of coming out of the cabin armed; 4 that whenever the dogs barked, Randall Weaver sent one of the Weaver children to a rock outcropping to look for the source of the disturbance and to report back to him; that Randall Weaver may have called in or had assistance from other individuals either living in the area or from outside the area moving into the location; that the Marshals had been attempting to effect an arrest of Randall Weaver for a firearms violation; and that the decision had been made that any team members going up the hill toward the cabin were in danger.

Finally, Horiuchi was briefed on the final rules of engagement that the FBI had developed for the Ruby Ridge crisis. The ordinary Rules of Engagement provide that an FBI agent may use deadly force only in self defense or with reason to believe that they or another are in danger of grievous bodily harm. The FBI modified these rules for the Ruby Ridge crisis. Originally, the team was told to shoot any armed adult if the shot could be taken without risk of harm to a child. Later that day, the rules were modified and restricted to advise that deadly force could be used against any armed adult male if the shot could be taken without a child being injured.

The following day, Horiuchi, armed with a high-powered .308 caliber rifle with a ten power telescopic scope, took a position approximately two to three hundred yards from the Weaver ranch. From his position, Horiuchi had a direct view of the cabin’s side. He could also see the front porch and back deck of the cabin. He could not see the front door when it was closed. If the front door opened, he could see it, but could not see inside the cabin.

At Weaver’s trial, Horiuchi testified that at around 5:45 or 5:50 p.m., a young woman came out of the cabin and moved toward the rock outcropping. She remained outside for a few minutes before returning inside. Horiuchi did not fire at the young female because she was not armed and he assumed she was a child. Right after the female went back inside the front door, a male exited the back door of the cabin to *990 the back deck and appeared to be checking some ponchos or blankets before returning inside. Horiuchi did not fire at the male because he did not appear to be armed.

Horiuchi further testified that, a few minutes later, he heard a helicopter crank up on the valley floor, lift off, and then he saw it disappear behind the trees. Horiu-chi heard the helicopter flying either behind him or to his right or left, but he could not see it. The federal agents used helicopters to get an overview of the land.

Within ten seconds after the helicopter lifted off, two males and a young female (later identified as Harris, Randall Weaver, and Weaver’s teenage daughter Sara,) exited the cabin and ran toward the rock outcropping. This outcropping had been described to Horiuchi during his briefing as a lookout position. The three were dressed similarly, in dark clothing. The last individual out the door, a male, had a long gun held in a “high port” carry, meaning up high and near his chest. The three disappeared from Horiuchi’s view for about three to five seconds. They reappeared again past the rock outcropping for another three to five seconds and then disappeared again.

Horiuchi told his partner to stay on the front door of the residence while he looked through the trees to see where the three individuals had disappeared. Horiuchi thought they were moving to defensive positions located along the rock outcropping. Next, he saw the man carrying the long gun come around the corner of the birthing shed. The man picked up a stick, prodded the ground, and looked in the air in the area above and to the right of Horiuchi. Horiuchi heard the helicopter in the area where the man was looking, and thought the man was looking at the helicopter. The man moved out of Horiuchi’s sight for a few more seconds. His partner remained on the front door.

When the man reappeared, he carried the weapon in the high port position and scanned the area above and behind Horiu-chi’s location. Horiuchi assumed the man was looking at the helicopter. The man continued to move along the side of the building with the gun in a high port carry “like he was getting ready to use it.” Hor-iuchi believed the man would try to take a shot at the individuals in the helicopter so he fired at the armed man. At the time, Horiuchi believed that he had missed, but he in fact had lightly wounded the man. The man turned the comer behind the birthing shed.

Within ten to twenty seconds of Horiu-chi’s first shot, the three ran back to the cabin. A man carried the rifle and followed about ten yards behind the other man and the teenage girl, who ran together. 5 Horiuchi assumed that the man with the rifle was the same man who he believed was attempting to shoot at the helicopter and who he had shot at earlier. In fact, the first man Horiuchi shot at was Randall Weaver and the man now carrying the rifle was Kevin Harris. Horiuchi assumed that this man was moving back to the house to get in a more protected location, and decided to shoot him. He knew that once the man reached the house, the man could shoot at Horiuchi, his fellow agents, or the helicopter, but the agents could not shoot back because of the children. Horiuchi was trying to prevent the man from getting back into the house.

Horiuchi testified that Harris ran at a high rate of speed toward the cabin, slowed down, paused, and then continued through the door. Specifically, Horiuchi testified that, “He [Harris] had his weapon in his right hand and he was reaching out with his left hand. It appeared to me like he was trying to hold the door open or moving somebody out of the way, and that’s the time I shot.” Harris flinched *991 and disappeared in the house. It was approximately 6:00 p.m.

Horiuehi had “led” Harris to account for the distance that Harris would move while the bullet traveled the intervening two hundred yards. Consequently, the cross hairs of the rifle were on the open door a few inches ahead of Harris. Unfortunately, unbeknown to Horiuehi, Vicki Weaver was on the far side of the door, holding it open, out of Horiuchi’s view. The bullet struck her in the head, killing her. It then struck Harris in the shoulder.

At the Weaver trial, Horiuehi testified that he could not see through the door, did not know if someone was behind the door, had not seen Vicki Weaver, and only intended to hit Harris. He did not consider his shot a shot into the house.

The front door to the cabin opens out. The bullet went through the lower right-hand pane of glass on the top half of the cabin’s front door. The top half of the door was glass with six divided panes. There were denim curtains that could be pulled over the window. It is disputed whether the curtains over the glass portion of the door were open or closed at the time of Horiuchi’s shot. Sara Weaver testified at the preliminary hearing that her family never closed the curtains. However, it was determined at Randall Weaver’s trial that the bullet hole in the curtain lines up with the bullet hole in the glass only if the curtain is pulled across the glass.

The witnesses testify differently as to where Vicki Weaver was standing right before and when Horiuehi fired the fatal shot. Horiuehi says he did not see her. Randall Weaver testified at the preliminary hearing that Vicki Weaver had been standing three or four feet beyond the porch holding the baby just after he was shot at the birthing shed, but that he had not seen her until he had been shot. However, when questioned regarding Vicki Weaver’s location when she was shot, Randall Weaver testified that, “She came out of the house with the baby- — she might have been on the porch. I don’t know to be honest with you. I know that she had the baby when she hollered at me and she was holding the baby when we went through the door.”

Sara Weaver testified at the preliminary hearing that her mother was holding the door open as Sara, Randall Weaver, and Harris were running for the door. During direct examination, Sara testified that after the first shot her mother stepped out of the door and yelled “what happened?” Sara further stated that, as she stumbled into the house, her mother was standing right in front of the doorway. However, in cross-examination, she clarified her earlier testimony and stated that she does not remember if Vicki Weaver was outside the threshold of the door. Neither Randall nor Sara Weaver saw the bullet hit Vicki Weaver.

After a review of the record, the district court concluded:

Based on these conclusions, the district court held that Horiuehi was entitled to immunity from criminal prosecution under the Supremacy Clause of the Constitution of the United States, and dismissed the indictment pursuant to Federal Rule of Criminal Procedure 12(b)(1). See Fed. R.Crim.P. 12(b)(1).

DISCUSSION

Because the district court neither held an evidentiary hearing nor purported to resolve any disputed issues of fact, and the critical facts necessary to resolve the legal issues are not in dispute, our stan *992 dard of review is de novo. See United States v. Head, 783 F.2d 1422, 1423 (9th Cir.1986).

In the leading case of Cunningham v. Neagle, 135 U.S. 1 , 10 S.Ct. 658 , 34 L.Ed. 55 (1890) (also known as In re Neagle), the Supreme Court considered a petition for writ of habeas corpus filed by Deputy United States Marshal Neagle. Sarah and David Terry had publicly threatened the life of Justice Field, who had presided over a case involving them in his capacity as Circuit Justice for the Ninth Circuit. Consequently, Neagle had been assigned to protect Justice Field during his travels in California, the Terrys’ home state. While briefly stopped in Fresno en route from Los Angeles to San Francisco, the Terrys boarded the train carrying Justice Field. David Terry attempted to provoke a fight with Justice Field, and when Terry appeared to reach for a knife, Deputy Neagle shot him to death. The State of California brought criminal charges against Neagle.

The Supreme Court granted the petition for writ of habeas corpus. In considering the “supremacy of the government of the United States,” the Court held:

Neagle, 135 U.S. at 62, 75 , 10 S.Ct. 658 .

Subsequent cases have developed this holding into a doctrine of immunity. See Kentucky v. Long, 837 F.2d 727 (6th Cir.1988); Morgan v. California, 743 F.2d 728 (9th Cir.1984); Baucom v. Martin, 677 F.2d 1346 (11th Cir.1982); Clifton v. Cox, 549 F.2d 722 (9th Cir.1977); see also Connecticut v. Marra, 528 F.Supp. 381 (D.Conn.1981); In re McShane, 235 F.Supp. 262 (N.D.Miss.1964); In re Lewis, 83 F. 159 (D.Wash.1897). To be entitled to immunity under this doctrine, the defendant must show two elements: first, the act must have been within the scope of official authority; second, the defendant must have honestly and reasonably believed the act to have been necessary and proper under the circumstances. See Clifton, 549 F.2d at 726, 728 . The second element of the test thus has both objective and subjective elements. See id. at 728 . 6

A. Immunity is Properly Decided on a 12(b) Motion

Horiuchi brought this motion to dismiss based on Supremacy Clause immunity under Federal Rule of Criminal Procedure 12(b). We must first decide if immunity is properly decided on such a motion. Rule 12(b) provides for pretrial motions to dismiss raising “[djefenses and objections based on defects in the indictment or information....” Fed.R.Crim.P. 12(b)(1). The Advisory Committee Notes to this provision, adopted in 1944, state that such “objections and defenses” include “all defenses and objections which are capable of determination without a trial of the general issue ... [including] ... former jeopardy, former conviction, former acquittal, *993 statute of limitations, immunity, lack of jurisdiction, failure of indictment or information to state an offense, etc.” Fed. R.Crim.P. 12(b)(1) and (2) Advisory Committee Notes.

When possible, Supremacy Clause immunity is an issue that should be determined before trial in order to avoid making the federal officer go through an entire state criminal procedure if he is immune. See Long, 837 F.2d at 752 . We thus agree with the Sixth Circuit’s holding in Long that “as a general proposition ... a Rule 12(b) motion is a proper vehicle by which to assert the defense of immunity under the Supremacy Clause of the United States Constitution.” Id. at 750 .

B. Scope of Authority

The district court found that the State has conceded that Horiuchi was acting within the scope of his duties at the time of the shooting of Vicki Weaver. The State does not dispute this issue on appeal.

C. Necessary and Proper

We therefore turn to the question of whether Horiuchi’s actions were “necessary and proper” under the circumstances. This determination requires an inquiry into whether Horiuchi honestly (subjective standard) and reasonably (objective standard) believed his actions to be necessary and proper. See Clifton, 549 F.2d at 728-29 . Horiuchi does not have to “show that his action was in fact necessary or in retrospect justifiable, only that he reasonably thought it to be.” Id. at 728 .

The district court found that Horiuchi honestly and reasonably believed that the intentional shooting of Mr. Harris was necessary and proper based upon existing circumstances at Ruby Ridge on August 22, 1992. The record supports this finding.

First, there is nothing in the record to dispute the district court’s finding that Horiuchi’s subjective belief that his actions were necessary and proper was honestly held. The State has presented no evidence of evil or malicious intent, nor has the State shown any facts to dispute Hori-uchi’s state of mind. In fact, the state only charged Horiuchi with manslaughter, a crime that is specifically charged as being “without malice.”

Second, the record supports the district court’s finding that Horiuchi’s belief was objectively reasonable. The entire period of time between when Horiuchi took the first shot at Randall Weaver and the second shot at Harris lasted only a few seconds. During these few seconds, he saw two men come out of the cabin who he assumed correctly were Randall Weaver and Kevin Harris. Horiuchi had been briefed that either Harris or Weaver had killed a federal agent just the day before. He knew at least one of them was armed, as he saw one carrying a rifle. He had been briefed that the residents of the cabin always were armed. While carrying the rifle in a “high port” position, “like he was getting ready to use it,” the armed man scanned the sky looking toward the area where the helicopter filled with federal agents hovered. Horiuchi took his first shot at the armed man, so the men were aware that he was nearby. All three disappeared from view for a few seconds, and then Horiuchi saw all three individuals running back to the cabin. One of the men (Harris), hung back slightly from the other two, carrying a rifle. Horiuchi fired his second shot.

We have previously addressed the question of when a law enforcement officer may use deadly force against an escaping felon. In Forrett v. Richardson, 112 F.3d 416 (9th Cir.1997), we interpreted the Supreme Court’s holding in Tennessee v. Garner, 471 U.S. 1 , 105 S.Ct. 1694 , 85 L.Ed.2d 1 (1985), regarding the constitutional use of deadly force. Gamer held:

Garner, 471 U.S. at 11 , 105 S.Ct. 1694 . In Forrett , we held that, under Garner , it was reasonable for officers to shoot Forrett, a suspect in a vicious assault during a home invasion robbery, to prevent his escape. Forrett had eluded officers for over an hour, vaulting fences and removing clothing. He was fleeing into a residential area where he could easily have taken hostages. We held that even if his capture were inevitable, deadly force was still reasonable because there was a substantial risk that Forrett would cause death or serious bodily harm if his apprehension were delayed. See Forrett, 112 F.3d at 420-421 .

Like Forrett, Harris presented a greater danger to the officers and to others if he got back inside the cabin, in part because the cabin provided cover from the marshals. Once inside, Harris could take up a defensive position where he could shoot out, but the officers could not shoot in without the danger of harming a child. Further, Harris could rearm himself and regroup with the others in the cabin. Horiuchi had been briefed that Randall Weaver may have called on or had assistance from other individuals in the area. He knew that all of the Weavers were armed; in fact, the initial gun battle where Marshal Degan was killed occurred because the Marshals were trying to arrest Randall Weaver for a firearms violation. Finally, Horiuchi knew that either Randall Weaver or Harris had shot and killed a marshal and that the armed man had just threatened a helicopter filled with federal agents; clearly the armed man was dangerous.

Horiuchi knew it would be difficult, if not impossible, to apprehend the man once he re-entered the cabin, due to the presence of the Weaver children. Had he hesitated for even a few seconds or called out a warning (even assuming that Harris could have heard him from 200-300 yards away), Harris could have fled into the cabin, taking up a defensive, armed position.

Courts must avoid the temptation to dissect the events which flashed before a police officer in a matter of seconds and to over scrutinize the officer’s response to those events. It is all too easy for judges pondering a cold record in the sanctity of their chambers to second guess the split-second decisions of the officer on the scene. As Judge Trott recently observed: “In cold print, the events ... appear one way, but as they were unfolding ..., they surely had a different cast and immediacy.” LaLonde v. County of Riverside, 204 F.3d 947, 962 (9th Cir.2000) (Trott, concurring in part and dissenting in part).

Faced with a dangerous armed man who was running to an area where he would present a greater danger, Horiuchi had less than a few seconds to make a decision. In the words of Justice Holmes, “[d]e-tached reflection cannot be demanded in the presence of an uplifted knife.” Brown v. United States, 256 U.S. 335, 343 , 41 S.Ct. 501 , 65 L.Ed. 961 (1921). Harris was a suspect in the shooting of a federal marshal; he was threatening a helicopter; he was running to a place where he could rearm, regroup, and take up a defensive position. Horiuchi did not see Vicki Weaver standing behind the open door with the curtains closed. He had no reason to believe that a woman holding a baby would be standing outside the threshold of the cabin, but hidden by the open door, after her husband had been shot at by an unknown agent. Horiuchi saw no danger to others, and he shot. He only intended to hit Harris.

The district court’s finding that Horiuchi reasonably believed that shooting Harris was necessary and proper under the circumstances is supported by the evidence. Today, all must regret the tragic result. However, given the circumstances at the *995 time, Horiuchi made an objectively reasonable decision.

The facts in Clifton v. Cox, 549 F.2d 722 (9th Cir.1977) are closely analogous to the present situation. In Clifton , we considered murder charges brought by the State of California against Bureau of Narcotics and Dangerous Drugs agent Lloyd Clifton. Clifton had been involved in a helicopter raid on the cabin of Dirk Dickenson, a suspected manufacturer of drugs. As Clifton exited the helicopter, fellow agent Fil-ben crumpled to the ground. Believing that Filben had been shot, Clifton kicked in the door of the cabin and charged at Dickenson. Dickenson fled into the woods. Clifton called at him to halt; Dickenson did not. Believing that Dickenson had shot his fellow agent, and that Dickenson would pose a greater danger to the other agents if he reached the shadows of the woods, Clifton shot him. Dickenson died. He turned out to be unarmed, and Filben had simply tripped. Relying on Neagle , we found Clifton to be immune from state court prosecution. Clifton acted within the scope of his authority, and his conduct was necessary and proper under the circumstances. See Clifton, 549 F.2d at 728-29 .

In Clifton we found that the agent’s behavior was objectively reasonable. Clifton incorrectly believed that a federal officer had just been shot, that the suspect was armed, and that the suspect, though fleeing, would present a greater threat to the pursuing agents if he reached the safety of the woods. Here, the facts are even more persuasive than in Clifton . Horiuchi knew a federal officer had been shot; he knew that Harris was armed; he thought that Harris had threatened the helicopter; and he thought that Harris would present a greater threat to the agents if he reached the safety of the house.

The State claims that here, unlike in Clifton , the evidence is “hotly disputed,” and thus, under Morgan v. California, 743 F.2d 728 (9th Cir.1984), the court should not have granted the motion to dismiss. Morgan is distinguishable. There, we considered whether the circumstances warranted a conclusion that the officers were in fact acting within the scope of their official duties at the time of the state-law violations. Several Drug Enforcement Administration agents had, apparently while drunk, backed their car into the car of a civilian couple. According to the couple, the agents brandished their guns and threatened the couple with arrest. The State of California charged the agents with several misdemeanor violations, including driving under the influence, assault with a deadly weapon, brandishing a firearm, and unlawful use of force.

The agents in Morgan petitioned for a writ of habeas corpus, claiming that when the incident occurred they had been en route to a meeting with an informant. The State, however, contended that the agents had merely been on their way to another bar. We reversed as an abuse of discretion the district court’s granting of the writ, on the ground that disputed issues of material fact rendered this particular controversy “hotly disputed.” Id. at 733 . In reversing the order granting the writ of habeas corpus, we held that:

Id.

In the present case, unlike Morgan , the evidence is not “hotly disputed.” The State argues that it is unclear where Vicki Weaver was standing at the time of the fatal shot, and therefore it is disputed whether Horiuchi saw her. Horiuchi states that he did not see Vicki Weaver. The State has produced no evidence that is materially inconsistent with Horiuchi’s tes *996 timony. Although the State points to the testimony of both Sara Weaver and Randall Weaver that each saw Vicki Weaver come outside of the house, (thus implying that Horiuchi should have seen her), neither one can place her outside the threshold of the door in a location that Horiuchi could see, at the time the fatal shot was fired. Sara Weaver testified that as she stumbled into the house, her mother was standing right in front of the doorway. She did not, however, remember if Vicki Weaver was outside the threshold of the door.

Although Randall Weaver testified that Vicki Weaver had been standing three or four feet beyond the porch holding the baby just after he was shot at the birthing shed, when questioned regarding Vicki Weaver’s location when he was running back toward the house, Randall Weaver did not know where she was standing. “She came out of the house with the baby — she might have been on the porch. I don’t know to be honest with you. I know that she had the baby when she hollered at me and she was holding the baby when we went through the door.” Neither Sara nor Randall Weaver’s testimony is inconsistent with Horiuchi’s testimony that he did not see Vicki Weaver.

Horiuchi states that he never saw Vicki Weaver. Once Randall Weaver, Sara Weaver, and Kevin Harris came outside the cabin, he watched them, often through the narrow scope of his rifle. He told his partner to stay on the front door. Even taking as true Randall Weaver’s uncertain testimony that his wife might have been three to four feet off the porch at the time that he was shot, this testimony is not inconsistent with Horiuchi’s testimony that he never saw Vicki Weaver.

The State points to Horiuchi’s own testimony that as Harris ran toward the house, “[h]e [Harris] had his weapon in his right hand and he was reaching out with his left hand. It appeared to me like he was trying to hold the door open or moving somebody out of the way, and that’s the time I shot.” Although Horiuchi’s statement is not clear, it does not imply that Vicki Weaver was outside the threshold of the door, that Horiuchi saw her, or that he knew she was behind the door. The district court did not, as is argued by the State, improperly decide a disputed issue of fact; Horiuchi’s testimony that he never saw Vicki Weaver and did not know she was behind the door is not disputed.

Finally, the State would have us hold that it was objectively unreasonable for Horiuchi to shoot because the rules of engagement were obviously unconstitutional. We need not pass on the constitutionality of the rules of engagement as such. It is Horiuchi’s conduct, not the rules of engagement, which must be judged.

The State cites extensively to Harris v. Roderick, 126 F.3d 1189 (9th Cir.1997), where Kevin Harris filed a Bivens suit claiming that Horiuchi used deadly force unconstitutionally. The district court denied Horiuchi’s and the other agents’ motion to dismiss on the ground of qualified immunity. On interlocutory appeal, this court upheld the district court’s holding. With regard to Horiuchi’s claim for qualified immunity, this court stated: “[I]t is extremely doubtful ... that Horiuchi will ever be able to establish that he is entitled to qualified immunity for his conduct in shooting Harris ... as the record now stands, he cannot do so.” Id. at 1202 . 7

Although predicated on the same incident, this court’s decision in Harris is not applicable to the case before us now. The court there determined only that Horiuchi could not establish qualified immunity on a motion to dismiss. Accordingly, all state *997 ments made in Harris were based on the untested allegations of Harris’ complaint. See Morley v. Walker, 175 F.3d 756, 759 (9th Cir.1999)(in determining qualified immunity the court must take the allegations in the plaintiff’s complaint as true). The court did not consider many facts apparent on the record in this case, such as Horiu-chi’s belief that the armed man was a threat to the helicopter. In the present case, the court must determine Horiuchi’s claim for supremacy clause immunity based on the evidence as presented here.

Moreover, Harris was decided on the issue of qualified immunity, not supremacy clause immunity. The State wrongly attempts to collapse the standards of qualified immunity into the “objectively reasonable” prong of supremacy clause immunity. The two immunities are not the same, nor do they serve the same purposes. Immunity under the Supremacy Clause from state criminal prosecution may cover instances in which qualified immunity does not apply. Supremacy Clause immunity derives from a specific provision of the Constitution itself, the purpose of which is to establish that federal law is the supreme law of the land. Accordingly, a federal agent doing his job in a way that is necessary and proper should not be held to answer to a state court criminal charge. In Bivens claims, on the other hand, qualified immunity protects a federal agent from being sued in a civil case by an individual for violating the person’s constitutional rights. See Harlow v. Fitzgerald, 457 U.S. 800, 814-815 , 102 S.Ct. 2727 , 73 L.Ed.2d 396 (1982); Katz v. United States, 194 F.3d 962, 967 (9th Cir.1999) (Qualified immunity analysis is the same for Bivens actions against federal officials as it is for claims against state officials under 42 U.S.C. § 1983 .). Thus, the concern addressed by supremacy clause immunity— protecting a federal agent from being held to answer to state laws-is not at issue in qualified immunity.

Supremacy clause immunity needs to be more protective than qualified immunity because it protects federal agents from the severity of being criminally convicted and having to face state criminal sanctions. Qualified immunity simply protects against monetary sanctions in a civil suit. Further, the federal government itself, not just the agent, has a real stake in upholding supremacy clause immunity. In sum, the two immunities are separate and there are no grounds for collapsing the two.

The judgment of the district court dismissing the charge against Horiuchi is therefore AFFIRMED.

. The Supremacy Clause provides: "This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding.” U.S. Const. Art. VI, Clause 2.

. Kevin Harris and Randall Weaver stood trial in federal court for an assault with a deadly weapon and for the first degree murder of Degan.

. The district court did not hold an evidentia-ry hearing. Rather, the court reviewed the transcript from the preliminary hearing and Horiuchi's trial testimony in United States v. Randall C. Weaver and Kevin L. Harris.

.This briefing was supported by Sara Weaver's testimony at the preliminary hearing that her family always carried guns.

. Horiuchi originally testified that the male with the weapon was nine paces, which he defined as ten feet, behind the girl and the other man. He later corrected his explanation to say that by nine paces he meant about nine to ten yards.

. Supremacy clause immunity is a defense; the defendant must show the two elements. The district court properly cites Clifton , which states that the necessary and proper standard does not require the defendant to "show that his action was in fact necessary or in retrospect justifiable, only that he reasonably thought it to be.” Clifton 549 F.2d at 728 . At one point, however, the District Judge’s decision seems to have confused who has the burden of establishing objective reasonableness. The district court stated, "the State has not carried its burden of presenting an affirmative showing that Mr. Horiuchi acted in bad faith or that Mr. Horiuchi acted in a way that cannot be considered reasonable....” Despite this apparent confusion, the district court opinion turns on Horiuchi’s testimony and evidence from the preliminary hearing, not on the State's lack of evidence. The district court applied the correct burden of proof when it found that Horiuchi honestly and reasonably believed shooting Harris to have been necessary and proper under the circumstances.

. The court also wrote, “[t]he Special Rules violated clearly established law and any reasonable law enforcement officer should have been aware of that fact.” Id. at 1202. This statement, made in the context of a discussion about the qualified immunity of the Rules’ authors, is dicta and does not apply to the question in this case of whether Horiuchi reasonably believed his actions to be necessary and proper.