9 GCA § 58.20: Felony Escape; Defined and Punished.

A person is guilty of a felony of third degree if he:

(a) escapes from within a detention facility where he is in custody upon a felony charge or conviction; or

(b) escapes from custody with the use or threat of use of force or violence upon another person or by any means creating a substantial risk of physical injury to another person.