Whether 18 U.S.C. § 751(a) requires the Government to prove that an escapee acted with the purpose of avoiding confinement, rather than knowingly leaving custody without permission.
Holding
No. The Government need only prove, at a minimum, that the defendant knew his actions would result in leaving physical confinement without permission.
Reasoning
Section 751(a) does not expressly state a mens rea requirement, but the Court presumed that Congress did not mean to create a strict-liability offense. The statute's language and history, however, gave no indication that Congress demanded the heightened mental state imposed by the D.C. Circuit.
An escape is ordinarily the unauthorized absence from custody. The trial court required the Government to prove that the defendants acted knowingly, intentionally, and deliberately; thus, the juries had to find that the prisoners knew they were leaving jail and knew they lacked authorization to do so.
The D.C. Circuit's added requirement—a conscious purpose to avoid the normal aspects of lawful confinement—had no support in the statute or its history. Conditions such as threats or abuse may bear on an affirmative defense of duress or necessity, but they do not negate the knowing act of leaving custody without permission.