Raygosa-Esparza

MEMORANDUM *

Estaban Raygosa-Esparza appeals his jury conviction on charges of conspiracy to possess with intent to distribute heroin, methamphetamine, and marijuana in violation of 21 U.S.C. §§ 841 (a)(1), 846, and of attempting to obtain contraband in prison in violation of 18 U.S.C. § 1791 (a)(2). Raygosa-Esparza argues that there was insufficient evidence to support his conviction on either charge and that the district court abused its discretion and violated his constitutional right to a fair trial when it excluded the results of the polygraph examination of government witness Dayton Williams, who was also an inmate at the same prison as Raygosa-Esparza. We *904 have jurisdiction pursuant to 28 U.S.C. § 1291 , and we affirm.

1. Sufficiency of Evidence for Conspiracy Conviction

“There is sufficient evidence to support a conviction if viewing the evidence in the light most favorable to the prosecution, any rational trier of fact could have found the essential elements of the crime beyond a reasonable doubt.” United States v. Diaz-Cardenas, 351 F.3d 404, 407 (9th Cir.2003). A conviction may be based on the uncorroborated testimony of a single accomplice or informant, United…