MEMORANDUM *

Luis Garcia-Ley appeals his guilty plea conviction and sentence for importation of marijuana in violation of 21 U.S.C. §§ 952 and 960. Garcia-Ley argues that he did not waive his rights under Miranda v. Arizona, 384 U.S. 436 , 86 S.Ct. 1602 , 16 L.Ed.2d 694 (1966), in light of Dickerson v. United States, 530 U.S. 428 , 120 S.Ct. 2326 , 147 L.Ed.2d 405 (2000), which held that Miranda was a constitutional decision. We have jurisdiction under 28 U.S.C. § 1291 , and we affirm.

“We review de novo whether [GarciaLey] voluntarily waived his [Miranda] rights ... and for clear error whether the waiver was knowing and intelligent.” United States v. Cazares, 121 F.3d 1241, 1243 (9th Cir.1997) (citing United States v. Doe, 60 F.3d 544, 546 (9th Cir.1995)).

Garcia-Ley argues that in light of the Supreme Court’s decision in Dickerson , a defendant cannot implicitly waive his rights under Miranda. Dickerson held that Miranda “announced a constitutional rule” governing the admissibility of statements made during custodial interrogation, and that a defendant must be given Miranda warnings before interrogation. 530 U.S. at 444 , 120 S.Ct. 2326 . Here, the district court found that Garcia-Ley was given the warnings required by Miranda and Dickerson , and Garcia-Ley has not challenged this conclusion on appeal.

Garcia-Ley asserts, however, that Dickerson implicitly overruled North Carolina v. Butler, 441 U.S. 369 , 99 S.Ct. 1755 , 60 L.Ed.2d 286 (1979). In Butler , the Supreme Court held that “an explicit statement of waiver is not invariably necessary to support a finding that the defendant waived the right to remain silent or the right to counsel guaranteed by the Miranda case.” Id. at 375-76, 99 S.Ct. 1755 . Dickerson holds that defendants are constitutionally entitled to Miranda warnings which Congress may not abrogate by statute. It does not engraft a new requirement that once the warnings have been given, a defendant must explicitly waive them before interrogation may begin. We reject Garcia-Ley’s assertion to the contrary.

*581 Garcia-Ley next argues that because Miranda is a constitutional decision, the Government must prove that he waived his Miranda rights by clear and convincing evidence. Under Colorado v. Connelly, 479 U.S. 157 , 107 S.Ct. 515 , 93 L.Ed.2d 473 (1986), a court need only find waiver of one’s Miranda rights by a preponderance of the evidence. Id. at 168, 107 S.Ct. 515 . Again, Dickerson in no way alters this evidentiary standard which has long been used by courts to evaluate the voluntariness of confessions. The preponderance of the evidence standard applies.

Finally, Garcia-Ley contends that he did not knowingly and voluntarily waive his Miranda rights. The Government presented clear and specific evidence of Gareia-Ley’s waiver, including the written waiver form executed by Garcia-Ley and corroborated by the testimony of two government agents regarding the circumstances under which the waiver was obtained. While we agree with the district court’s admonition against continued use of the different form created by the Customs agent based on his personal experience, rather than the preferred official U.S. Customs waiver, the agent’s form contained all of the required Miranda warnings and was initialed and signed by Garcia-Ley. The district court did not clearly err by crediting the testimony of the two government agents after a thorough evidentiary hearing, and by finding that Garcia-Ley lacked credibility based on his testimony. On this record, we hold that there was no error in the district court’s conclusion that Garcia-Ley knowingly and voluntarily waived his Miranda rights.

AFFIRMED.

This disposition is not appropriate for publication and may not be cited to or by the courts of this circuit except as may be provided by NINTH CIRCUIT RULE 36-3.