Jacob Christian Muse, 21, has been arrested in connection with the deaths of 75-year-old Thomas Richard Hawk Sr., his 75-year-old wife Evelyn Hawk and their 18-year-old grandson Luke Hawk. [DOWNLOAD: Free WSB-TV News app for alerts as news breaks] Hawk Sr. and his wife had the Lock, Stock & Barrel shooting range in Grantville, Coweta. The family was killed on April 8, and investigators found that the perpetrator had stolen more than 40 weapons and had also turned off the company’s cameras. MOVIE STORIES: Muse was arrested at a home in College Park on April 15. Investigators found stolen pistols and long-range weapons inside Muse’s home. Muse was charged with three counts of manslaughter. [SIGN UP: WSB-TV Daily Headlines Newsletter] Agents of the Georgia Bureau of Investigation found that Muse had previously lived in Grantville and was a customer of the shooting range. He had bought at least one weapon from the company and spent time there at the shooting range, agents said. It is not clear if the Hawk family had a direct relationship with Muse. So far, Muse is the only person arrested, but Grantville police say that could change. Tommy and Evelyn Hawk ran Lock, Stock & Barrel and were part of the small, close-knit community for almost 30 years. Their grandson Luke was on a spring break from high school, helping his grandparents shop. Luke Hawk’s father, Coweta County Medical Examiner Richard Hawk, found the bodies of his family. It is unclear whether Muse will face other charges. © 2022 Cox Media Group