A former felon turned criminal justice reform activist is the main suspect in the murder of another felon whose remains were found in his New York City apartment.

Sheldon Johnson, 48, was originally sentenced to 50 years in 1998 for armed robberies where he claimed he was not involved in hurting any of his victims. Johnson was released in May after serving over 25 years of his sentence. Police have since charged him with second-degree murder and concealment of a human corpse.