An Atlanta shooting suspect remains on the loose after police say he shot and killed a 51-year-old security guard Monday evening. In a press release, the Atlanta Police Department (APD) said officers responded to a reported shooting victim in the 300 block of Cleveland Avenue SW at approximately 6:52 p.m. Monday. Upon arrival, officers discovered 51-year-old Anthony Frazier with an apparent gunshot wound, according to the release. Authorities pronounced Frazier dead at the scene.