Having waived jury trial, Green-well was convicted of escaping from Lor-ton Reformatory in violation of 18 U.S.C. § 751 and sentenced to a term of one year to begin upon expiration of sentences he was then serving. At trial, the Government established Greenwell’s original reception as a prisoner at Lor-ton and his unauthorized departure. Taking the stand in his own behalf, Greenwell ■ testified that he left Lorton in the company of a person whom he assumed to be a prison employee to help deliver furniture to Washington, D. C. He further testified that upon their arrival in Washington, his companion told him to do some window shopping, and that when he returned he was unable to locate this individual. His explanation for not turning himself over to the authorities was that, being a Black Muslim, he feared persecution.

On appeal, Greenwell’s sole contention is that the Government failed to prove its case beyond a reasonable doubt. The Government’s evidence established a prima facie case of escape and the District Court, as the trier of fact, was not obligated to accept Greenwell’s narrative, particularly in view of his failure to name or produce the “mystery man” whom he accompanied to Washington.

The judgment of the District Court is

Affirmed.