James Steven Knowles, 58, disappeared from the Carva Apartments in Oklahoma City on the evening of October 3, 2017. He lived and worked there as the maintenance man. His estranged wife reported him missing after his roommate returned to find Knowles gone but his cell phone, keys, and cigarettes—items he would not normally leave—still in the apartment.

Investigators later focused on resident and coworker Mario Normore, who had been arrested in October 2017 on armed robbery charges. Normore was accused of telling different people that he had to get rid of Knowles because he was a snitch or over an unpaid $20 debt. Normore was charged with Knowles’s murder along with three others; authorities concluded Knowles was a homicide victim despite his body never being found.

Anyone with information about Knowles, his last known movements at Carva Apartments, or Mario Normore’s activities that fall on or before October 2017 is asked to come forward.