The mass shooter who opened fire during Mass inside a Texas church killing at least 27 – including a two-year-old child – has been identified as a 26-year-old former Bible study teacher who was dishonorably discharged from the US Air Force.

Devin Patrick Kelley walked into the First Baptist Church of Sutherland Springs, dressed in black, tactical gear with a ballistics belt and an assault rifle, and began shooting, according to local law enforcement sources.

The attack only stopped when Kelly was tackled by a heroic local man.

Kelley, 26, of New Braunfels, a suburb of San Antonio, fled in his SUV but crashed near state lines and was killed after a brief foot chase into Guadalupe County, according Guadalupe County Sheriff’s Office spokesman Robert Murphy.

It’s still unclear if the gunman shot himself or was taken down by a local resident.

San Antonio police raided Kelley’s home on Sunday evening, with K9 and bomb squad units.

Kelley, who was reportedly married, had recently posted a photo of an AR-15 style gun on his Facebook page with the caption: ‘She’s a bad b***h.’

A LinkedIn account which appears to be Kelley’s states that he joined the US Air Force after graduating New Braunfels High School in 2009. He worked in logistics and supply in the Air Force until he was dishonorably discharged in 2014 and was even court martialed in May 2014, CBS News reported.

He then volunteered as a teacher for Bible studies at Kingsville First Baptist Church, according to his LinkedIn which shows him posing which a young child. Police are now investigating the possibility that Kelley was in a local militia group. Daily Mail