Authorities have arrested an 81-year-old man on charges he allegedly shot and killed his ex-wife in suburban Oak Lawn earlier this year. WATCH HERE WATCH HEREPolice said Buss-Kincaid had been shot, and she was pronounced dead at the scene. During the course of their investigation, detectives identified 81-year-old Charles Buss, Buss-Kincaid’s ex-husband, as a person of interest in her death. That investigation allegedly revealed Buss had been at Oak Lawn at the time of her death, and had since returned to Missouri, where he is a resident. On June 16, an arrest warrant was issued on a first-degree murder charge in the case, and one month later on July 16, U.S.