As used in this part, unless the context otherwise requires:
(1) “Custody” means under arrest by a law enforcement officer, or under restraint by an officer, employee or agent of government pursuant to an order of a court;
(2) “Deadly force” means force that is intended or known by the defendant to cause or, in the manner of its use or intended use, is capable of causing death or serious bodily injury; and
(3) “Escape” means unauthorized departure from custody or failure to return to custody following temporary leave for a specific purpose of limited period, but does not include a violation of conditions of probation or parole.