Mark Anthony Romero, 34, was fatally shot during an altercation at the O.K. Market & Liquor, 2002 E. Irvington Road in Tucson, on the evening of Friday, July 24, 2020. A verbal dispute between Romero and another man escalated into a physical fight; during the struggle the other man produced a handgun and shot Romero.

Officers responding to a 9-1-1 call at about 6:00 p.m. found Romero with gunshot wounds. He received aid from police and later paramedics but was pronounced dead at the scene. Detectives identified 31-year-old Isaac R. Serna-Yslas as the suspect; he fled immediately after the shooting but was located and arrested nearby a short time later and booked into the Pima County Jail on one count of first-degree murder and one count of prohibited possession of a firearm.

Did anyone witness the confrontation at the store or have information about what led to the dispute?