Donald Wilson, 51, was killed the night of February 28, 2015, inside a duplex on Santa Anna Drive near Route WW in the Columbia, Missouri area when gunfire erupted at the residence. Deputies arriving after multiple reports of shots found Wilson and his sister, Deborah Koontz, dead at the home and another resident, Willie Mays, shot in the head and taken to a hospital in critical condition.

Investigators said everyone involved lived at the duplex, including the suspected shooter, Cornelius C.J. Parker. Witnesses and 911 calls led deputies to a white sedan; a pursuit ended when the car lost control turning onto southbound U.S. 63 near Broadway. Parker exited with a handgun and opened fire on a deputy, who returned fire and killed Parker at the scene. No arrests or prosecutions followed because the suspected gunman died during the confrontation, and authorities reported no known motive at the time.

Willie Mays initially survived but remained gravely ill and was later found unresponsive and pronounced dead at University Hospital in June 2015. Did anyone who lived near Santa Anna Drive or knew the people there notice tensions or changes in the household before that night?