The man who opened fire at a Texas church on Sunday sent threatening text messages to his mother-in-law who attended the Sutherland Springs church but was not present on Sunday, the FBI said. Christopher Combs, special agent in charge of the FBI’s San Antonio Division, said during a Monday press conference the mass murder is part of a “domestic situation.” In 2014, Kelley was discharged from the Air Force after he was convicted of assaulting his wife and a child. According to the New York Times, Kelley pleaded guilty in 2012 to assaulting his wife and his stepson so badly that he cracked the infant's skull. Kelley killed his grandmother-in-law during the Sutherland Springs shooting, friends told CNN on Monday. The shooting was recorded by the congregation's camera, officials said.