Mark Manning was a 29-year-old man from Chicago who was found dead in his apartment on January 2, 2021. He suffered multiple gunshot wounds and police treated the scene as a murder. Family and friends said he had no known enemies and were shocked by the violence.

Investigators identified several suspects and arrested a former acquaintance who had a prior record of violent offenses. At trial the prosecution presented witness testimony placing the defendant near Manning’s apartment the night of the killing and forensic evidence including fingerprints and DNA. The jury convicted the defendant of first-degree murder and imposed life without parole.

Anyone who knew Mark, his routines, or saw activity near his apartment around January 2, 2021 is asked to share what they know.