HOUSTON — The man authorities have identified as the gunman in the mass shooting at a Texas church was discharged from the Air Force for allegedly assaulting his spouse and child, according to an Air Force spokeswoman.

The spokeswoman, Ann Stefanek, said Sunday Devin Kelley was sentenced to 12 months’ confinement after a 2012 court-martial. He ultimately received a bad conduct discharge and reduction in rank. She said Kelley served in Logistics Readiness at Holloman Air Force Base in New Mexico from 2010 until his discharge in 2014.

Authorities did not announce his name at a news conference on the shooting.

But a US official and a law enforcement official identified Kelley as the person who opened fire Sunday at the First Baptist Church of Sutherland Springs, killing 26 people.

The US official said Kelley doesn’t appear to be linked to organized terrorist groups. The official said investigators are looking at social media posts Kelley may have made in the days before Sunday’s attack, including one that appeared to show an AR-15 style semiautomatic weapon. The official requested anonymity because the person did not have authorization to speak publicly.

An address listed in online records as belonging to Kelley is located in New Braunfels, about 35 miles from Sutherland Springs.

At the address listed for Kelley, two sheriff’s vans were parked and police officers stood at the gate of a cattle fence surrounding the property. Law enforcement officials there declined to comment.

Neighbors said they heard intense gunfire coming from the direction of the home in recent days. “It was definitely not just a shotgun or someone hunting,’’ said Ryan Albers, 16, who lives across the road. “It was someone using automatic weapon fire.’’