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SUTHERLAND SPRINGS, TX - NOVEMBER 5:  Law enforcement officials gather near the First Baptist Church following a shooting on November 5, 2017 in Sutherland Springs, Texas. At least 20 people were reportedly killed and 24 injured when a gunman, identified as Devin P. Kelley, 26, allegedly entered the church during a service and opened fire.  (Photo by Erich Schlegel/Getty Images)
SUTHERLAND SPRINGS, TX - NOVEMBER 5:  Law enforcement officials gather near the First Baptist Church following a shooting on November 5, 2017 in Sutherland Springs, Texas. At least 20 people were reportedly killed and 24 injured when a gunman, identified as Devin P. Kelley, 26, allegedly entered the church during a service and opened fire.  (Photo by Erich Schlegel/Getty Images)

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    How the Texas killer got his gun

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How the Texas killer got his gun

As investigators uncover more of the Texas church shooter's history, questions arise on how he was able to buy a gun. CNN's Jake Tapper reports.

How the Texas killer got his gun

As investigators uncover more of the Texas church shooter's history, questions arise on how he was able to buy a gun. CNN's Jake Tapper reports.