the escape of a prisoner by the express consent of the sheriff.
See also: Voluntary
Voluntary escape
VOLUNTARY ESCAPE. The giving to a prisoner voluntarily, any liberty not authorized by law. 5 Mass. 310; 2 Chipm. 11; 3 Harr. & John. 559; 2 Harr. & Gill. 106; 2 Bouv. Inst. n. 2332.