(6)7.1.2 Escape in the First Degree
A person is guilty of Escape in the First Degree under this subsection if he or she, while lawfully in custody authorized by statute, escapes such custody and:
(a) Causes serious injury or death to another person; or
(b) Is serving time in a state prison or penitentiary and convicted of any of the following offenses:
Escape in the Third Degree is a Class D Felony.