Investigators work at the scene of a mass shooting at the First Baptist Church in Sutherland Springs, Texas, on Sunday Nov. 5, 2017. A man opened fire inside of the church in the small South Texas community on Sunday, killing more than 20 people.(Jay Janner/Austin American-Statesman via AP)/Austin American-Statesman via AP)
Jay Janner/Austin American-Statesman/AP
Investigators work at the scene of a mass shooting at the First Baptist Church in Sutherland Springs, Texas, on Sunday Nov. 5, 2017. A man opened fire inside of the church in the small South Texas community on Sunday, killing more than 20 people.(Jay Janner/Austin American-Statesman via AP)/Austin American-Statesman via AP)
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These two images widely distributed on social networks on November 06, 2017, allegedly show 26-year-old Devin Kelley who walked into the church in Sutherland Springs with an assault rifle on November 05, killing 26 people and wounding 20 more.    
Sunday's carnage in Sutherland Springs, a rural community of some 400 people southeast of San Antonio, came just five weeks after the worst gun massacre in modern US history, when a gunman killed 58 people at an open-air concert in Las Vegas. / AFP PHOTO / OFF / - / RESTRICTED TO EDITORIAL USE -  NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

-/AFP/Getty Images
-/AFP/AFP/Getty Images
These two images widely distributed on social networks on November 06, 2017, allegedly show 26-year-old Devin Kelley who walked into the church in Sutherland Springs with an assault rifle on November 05, killing 26 people and wounding 20 more. Sunday's carnage in Sutherland Springs, a rural community of some 400 people southeast of San Antonio, came just five weeks after the worst gun massacre in modern US history, when a gunman killed 58 people at an open-air concert in Las Vegas. / AFP PHOTO / OFF / - / RESTRICTED TO EDITORIAL USE - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS -/AFP/Getty Images
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US President Donald Trump attends a joint press conference with South Korea's President Moon Jae-In at the presidential Blue House in Seoul on November 7, 2017. US President Donald Trump arrived in Seoul on November 7 vowing to "figure it all out" with his South Korean counterpart Moon Jae-In, despite the two allies' differences on how to deal with the nuclear-armed North. / AFP PHOTO / Jim WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
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Crime scene tape surrounds the Mandalay Hotel (background) after a gunman killed at least 50 people and wounded more than 200 others when he opened fire on a country music concert in Las Vegas, Nevada on October 2, 2017. Police said the gunman, a 64-year-old local resident named as Stephen Paddock, had been killed after a SWAT team responded to reports of multiple gunfire from the 32nd floor of the Mandalay Bay, a hotel-casino next to the concert venue. / AFP PHOTO / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
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Presser update from Stockdale City Hall, on church shooting at First Baptist Church in Sutherland Springs, TX, Multiple people have been killed and many more injured.   Exceptions: Embargo - Live signals of PLANNED, non-breaking news events - where TWC is the only affil covering the event live - are not available for distribution via Newsource live channels.  The live signal can, however, air live on CNN networks, and be turned as tape on Bitcentral once the event ends.  This policy can be overridden with special permission from the station.  Additional Embargo:    Additional Source(s):    Date Shot: 11/5/2017   Shipping/Billing Info:       Description:   Projects:   None  Cost Center:   Atlanta National Desk / 20100101    Created By: gemontgomery  On: 1509915475  --------------------------------------------------------------------------------
Spectrum News (San Antonio);
Presser update from Stockdale City Hall, on church shooting at First Baptist Church in Sutherland Springs, TX, Multiple people have been killed and many more injured. Exceptions: Embargo - Live signals of PLANNED, non-breaking news events - where TWC is the only affil covering the event live - are not available for distribution via Newsource live channels. The live signal can, however, air live on CNN networks, and be turned as tape on Bitcentral once the event ends. This policy can be overridden with special permission from the station. Additional Embargo: Additional Source(s): Date Shot: 11/5/2017 Shipping/Billing Info: Description: Projects: None Cost Center: Atlanta National Desk / 20100101 Created By: gemontgomery On: 1509915475 --------------------------------------------------------------------------------
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(CNN) —  

A picture is starting to emerge of the suspected gunman in a deadly mass shooting at First Baptist Church in Sutherland Springs, Texas.

Two law enforcement sources briefed on the investigation identified the shooter as Devin Patrick Kelley, 26.

What we know about the shooting

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.

Devin Patrick Kelley, 26, killed 26 people at a Texas church, police say.
Texas DPS
Devin Patrick Kelley, 26, killed 26 people at a Texas church, police say.

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.

Kelley is accused of killing 26 people, including the 14-year-old daughter of the church’s pastor, and injuring more.

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. It’s not clear if he shot himself or if the neighbor shot him.

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.

Deadly mass shootings in modern US history

Texas Gov. Greg Abbott called the incident the largest mass shooting in the state’s history.