On May 21, 2023, 41-year-old Jason McConnell was working as a security guard at the Klymax Lounge on Indiana Avenue in Kansas City, Missouri, when a targeted ambush at the venue turned into a violent mass shooting. The attack, which occurred just after 1:25 a.m. as a performance ended, was aimed at local rapper Clarence Henderson, known as Nutty Still Gassin. Henderson was fatally struck; McConnell, who had been manning the door and reportedly was not wearing his usual protective vest that night, was caught in the crossfire and pronounced dead at the scene. A 24-year-old woman, Antoinette Brenson, was also killed and two others were wounded.

McConnell was described by loved ones as a jack of all trades who juggled multiple jobs—managing a wireless store, serving at a restaurant and working security—and acted as a father figure to his stepchildren. He enjoyed fashion, collected sneakers and often wore cowboy boots and hats while listening to country music. In July 2023 authorities charged 36-year-old Isiah D. Clinton with three counts of first-degree murder, three counts of armed criminal action and two counts of first-degree assault, alleging he waited outside the lounge and opened fire; police said the investigation remained active and that others may have been involved. If anyone knew Jason, his routines, or saw activity outside the Klymax Lounge that night, please share what was seen.