Christopher Dunn, 52, is latest person released from a Missouri prison due to evidence of wrongful conviction

A Missouri judge on Monday overturned the conviction of Christopher Dunn, who has spent more than 30 years in prison for a killing he has long contended he didn’t commit.

The ruling is likely to free Dunn from prison, but it wasn’t immediately clear when that would happen. He has been serving a sentence of life without parole.

St Louis circuit judge Jason Sengheiser’s ruling came several weeks after he presided over a three-day hearing on Dunn’s fate.

Dunn, now 52, was convicted of first-degree murder in the 1990 shooting of 15-year-old Ricco Rogers. St Louis circuit attorney Gabe Gore filed a motion in February seeking to vacate the guilty verdict, with a hearing in May.