A Florida man went on a shooting spree at his former workplace today, killing two, injuring two others, and finally killing himself, CNN reports. According to local authorities, Hubert Allen Jr., 72—the step-grandfather of Buffalo Bills running back CJ Spiller—fatally shot his former boss, Marvin Pritchett, 80, and a coworker, Rolando Gonzalez-Delgado, 28. Two other former colleagues, Lewis Mabrey, Jr., 66, and David Griffis, 44, were also shot, but not killed. Griffis remains in critical condition in hospital. The shootings happened at two locations in Union County, reports WCJB: a farm owned by Pritchett, and the trucking company where Allen had been employed. He went home afterward, where he shot and killed himself.