Two law enforcement sources briefed on the investigation identified the shooter as Devin Patrick Kelley, 26.
Kelley was once a member of the US Air Force, spokeswoman Ann Stefanek said. He served in logistics readiness at Holloman Air Force Base in New Mexico, starting in 2010.
Kelley was court-martialed in 2012 for two counts of Article 128 of the Uniform Code of Military Justice, assault on his spouse and assault on their child, Stefanek said. Kelley received a bad conduct discharge, confinement for 12 months and a reduction in rank, she said. The Air Force did not provide a date of the discharge.
At a press briefing Monday morning, Texas authorities said that they believe the shooting was the result of a domestic situation. They say the suspect’s mother-in-law attended services at First Baptist Church in Sutherland Springs, and she had received threatening text messages from him.
Authorities say they found two handguns in Kelley’s car in addition to the rifle used in the shooting. Kelley purchased all of the guns himself and did not have a license to carry.
“He had a non-commissioned, unarmed private security license, similar to a security guard at a concert type situation. There were no disqualifiers entered into the National Crime Information database that would preclude him from receiving a private security license,” Freeman Martin, Texas Department of Public Safety regional director, said Monday. “Private security background checks, including fingerprints and criminal history checks with the Texas Crime Information Center and National Crime Information Center databases, were checked and he was cleared.”
Kelley is accused of killing 26 people, including the 14-year-old daughter of the church’s pastor, and injuring 20 people.
Authorities say ten of those injured remain in critical condition. Four are still in serious condition, and six people are in stable condition or have been released.
A man who lives next door to the church grabbed his own gun and approached Kelley as he was leaving after the shooting. The gunman dropped a rifle in front of the church and fled in his car, officials said.
Kelley was found dead in his car from a gunshot wound about eight miles from the church, a law enforcement official briefed on the investigation told CNN.
“Investigators found evidence at the scene that indicates the subject may have died from a self-inflicted gunshot wound,” Martin said.
An autopsy was performed Monday morning, and Martin said information will be forthcoming.
Kelley purchased the Ruger AR-556 rifle in April 2016 from an Academy Sports & Outdoors store in San Antonio, a law enforcement official told CNN.
When Kelley filled out the background check paperwork at the store, he checked the box to indicate he didn’t have disqualifying criminal history, the official said. He listed an address in Colorado Springs, Colorado when he bought the rifle, the official said.
Texas Gov. Greg Abbott called the incident the largest mass shooting in the state’s history.
(© Copyright 2017 CBS Broadcasting Inc. All Rights Reserved. CNN contributed to this report.)