On the late night of March 15, 2020, Troy Rapp, a 57-year-old employee at a Kum & Go on East Chestnut Expressway in Springfield, Missouri, was killed when a gunman crashed into the storefront and began shooting inside. The attacker, later identified as 31-year-old Joaquin S. Roman, had been conducting a roving active shooter attack across the city before entering the store armed with a rifle and a pistol that were acquired legally. Two other customers or contractors in the store were also killed, and a responding police officer, Christopher Walsh, was fatally shot while attempting a rescue; another officer, Josiah Overton, was wounded. The shooter then died by suicide at the scene, ending the immediate threat.

Investigators reported Roman had moved to Missouri from California in 2019 and had searched online about mental illness and tactical shooting. A subsequent report described him as expressing neo-Nazi and anti-government beliefs on social media. Authorities examined his devices and belongings but had not established a single definitive motive in the immediate aftermath. If anyone knew Troy Rapp or observed activity around the Kum & Go that night, any information could still be important.