OPINION

Stephens appeals from his conviction after a jury trial for robbery of a national bank [ 18 U.S.C. § 2113 (a) and (d)]. He contends that the trial judge’s comments to the jury denied him a fair trial and that there was insufficient evidence to support the verdict. Agreeing with the first contention, we reverse.

*916 At the close of Stephens’ trial in the district court, the judge said:

We have recently considered jury instructions given in two California state criminal cases in which trial judges stated their opinions that the defendants were guilty beyond a reasonable doubt. Davis v. Craven, 485 F.2d 1138 (9th Cir. 1973); Gonsior v. Craven, 449 F.2d 20 (9th Cir. 1971). The judge in each case cautioned the jurors that they were the exclusive judges of fact and should exercise independent judgment in weighing the judicial comment. We found no error of constitutional dimension in either case.

In both Gonsior and Davis we considered United States v. Murdock, 290 U.S. 389 , 54 S.Ct. 223 , 78 L.Ed. 381 (1933), the only Supreme Court decision brought to our attention that involved a jury instruction comparable to the one with which we are presently concerned. The Court affirmed the reversal of a conviction because of the instruction given, stating that a judge’s power to express an opinion as to the guilt of the defendant exists, but that “it should be exercised cautiously and only in exceptional cases.” 290 U.S. at 394 , 54 S.Ct. at 225 . Such an exceptional case exists “where upon the undisputed and admitted facts the defendant’s voluntary conduct amounted to the commission of the crime defined by the statute.” Id. The Court held in Murdock that since the evidence was in conflict as to one element of the crime, the judge’s instruction, although tempered with a warning to the jury to act independently, was reversible error.

In Gonsior , we emphasized that Mur-dock was an appeal from a federal court conviction and that the Supreme Court did not base its decision on constitutional grounds “but obviously on its power to supervise procedures in the federal courts.” 449 F.2d at 22 . Gonsior and Davis , on the other hand, involved petitions for habeas corpus based on state convictions. We held that the jury instructions given in those cases were not errors of constitutional dimension and we refused to impose the Murdock rationale on the states.

The present case, as in Murdock , is an appeal from a federal conviction. Similarly, this is not that exceptional case where the evidence against defendant is so overwhelming that his guilt is virtually undisputed.

At the time of the bank robbery, defendant was an escapee from the Washington State Penitentiary. There was *917 evidence that he was involved in other criminal activity near the time and place of the robbery. The evidence of his involvement in this bank robbery, however, was far from overwhelming.

Perhaps the strongest evidence against defendant was his confession of the robbery to an FBI agent, a confession which he later repudiated. In addition, a bank employee recognized defendant as one who had been in the bank about the time of the robbery. His description of the clothing worn by defendant matched the description by one of the tellers of the clothing worn by the robber. However, neither the teller who was robbed, nor the one at the adjoining wicket, could identify defendant as the robber. Moreover, neither the handwriting on the demand note nor the fingerprints on the note were those of the defendant.

In light of the absence of overwhelming evidence of guilt, the judge’s comments to the jury may well have tipped the scales against defendant, denying him the fair trial to which he was entitled. The instructions to the jurors advising them that they were not bound by his opinion were not sufficient in this ease to cure the error. 1

It is well settled that a judge presiding at a trial in federal court may make comments on the evidence. He must carefully avoid prejudging the defendant, however, concentrating instead on making a fair effort to clear unanswered issues and point out inconsistencies. Bursten v. United States, 395 F.2d 976, 982 (5th Cir. 1968). Judicial comments must be aimed at aiding the jury’s fact finding duties, rather than usurping them. 2

*918 We note that defense counsel took ho exception to the instructions given here. A timely instruction could have come only after the instructions and admonitions to the jury. Since it could not have resulted in an additional, curative instruction, it would have served no useful purpose. The absence of such an exception does not foreclose our consideration of the instructions given. United States v. Woods, 252 F. 2d 334, 336 (2d Cir. 1958).

Reversed and remanded.

. “It is well known, as a matter of judicial notice, that juries are highly sensitive to every utterance by the trial judge, the trial arbiter, and that some comments may be so highly prejudicial that even a strong admonition by the judge to the jury, that they are not bound by the judge’s views, will not cure the error.” Bursten v. United States, 395 F.2d 976, 983 (5th Cir. 1968).

. We note that the American Bar Association Standards Relating to Trial by Jury, § 4.7 (1968), are in accord.

Commentary: