The case was reopened when he went to police to say he’d shot someone years earlier.
Reports say he got the minimum sentence for his April murder conviction: 15 years to life.
G. Dep, 37, went to a police station in December 2010 to say he’d fired at someone trying to rob him on a street corner when he was 17 to 19 years old.
Authorities paired his account with the 1993 death of John Henkel.
At trial, his lawyer questioned whether police made the right match.
G. Dep, whose real name is Trevell Coleman, had hit records with “Special Delivery” and “Let’s Get It” in the early 2000s.