42 Pa.C.S. § 9126: Extradition of persons imprisoned or awaiting trial in another state or who have left the demanding state under compulsion.

(a) Extradition from another state.--When it is desired to have returned to this Commonwealth a person charged in this Commonwealth with a crime, and such person is imprisoned or is held under criminal proceedings then pending against him in another state, the Governor of this Commonwealth may agree with the executive authority of such other state for the extradition of such person before the conclusion of such proceedings or his term of sentence in such other state, upon condition that such person be returned to such other state at the expense of this Commonwealth as soon as the prosecution in this Commonwealth is terminated.

(b) Surrender to another state.--The Governor of this Commonwealth may also surrender on demand of the executive authority of any other state any person in this Commonwealth who is charged, in the manner provided in section 9144 (relating to issuance of requisition), with having violated the laws of the state whose executive authority is making the demand, even though such person left the demanding state involuntarily.