On the night of February 28, 2015, gunfire erupted at a duplex on Santa Anna Drive in Boone County, just east of Columbia, Missouri. Deputies arriving around 10 p.m. found three people had been shot inside the home and in the driveway. Two housemates, 53-year-old Deborah W. Koontz and her brother, 51-year-old Donald R. Wilson, were pronounced dead at the scene.

Forty-four-year-old Willie J. Mays was found with a critical gunshot wound to the head and was alive when emergency responders arrived. He was transported to University Hospital for emergency treatment and remained in precarious condition for several months after the attack. Investigators say the shootings were carried out by a roommate, identified as 28-year-old Cornelius C.J. Parker, who fled in a white four-door vehicle. Deputies pursued the vehicle; after Parker lost control and spun out near Highway 63 and Broadway he exchanged gunfire with a Boone County Sheriff’s deputy and was shot and killed at the scene.

Willie Mays later died on June 4, 2015, from the injuries he sustained that night, becoming the third fatality. Does anyone have information about the residents of that duplex or about events leading up to the shooting?