Damien Cionzynski, 23, of Harwood Heights was shot and killed in the early morning of May 28, 2016. The shooting happened about 5:15 a.m. in the 6300 block of West Montrose Avenue in Portage Park after a physical altercation inside a business; Cionzynski was shot in the head and pronounced dead at the scene. The Cook County medical examiner ruled the cause of death a gunshot wound to the head.

Police arrested 24-year-old Florin Mulosmani of Chicago and charged him with first-degree murder, saying Mulosmani and another unidentified person had been fighting with Cionzynski before the shooting. It was not specified whether Mulosmani fired the shot; he was held without bail and faced serious charges related to the fatal encounter.

Anyone who was in the Portage Park area that morning or who knew Damien and the people involved is asked to share what they know.