The Erath County Sheriff's Office issued an alert for the arrest of the suspect, who was later identified as Eddie Routh, 25. Officials warned that Routh was traveling in a Ford F-150 pickup with large tires and rims. They said he was believed to be highly trained with military experience.
Routh was reportedly later captured in Lancaster, south of Dallas.
Investigators believe Routh, a former Marine, turned his weapon on Kyle and the second victim before fleeing the scene.Update: Some more information:
The motive of the shooting remained unclear, Bryant said. "Not a clue; absolutely no idea."
WFAA/Channel 8 quoted unnamed sources as saying that Kyle of Midlothian and a neighbor had taken Routh on an outing to help him deal with post-traumatic stress disorder. Routh turned on the men and shot them in the back, the report added.
The sheriff said he could not confirm how the victims were shot.
In January 2012, the Cleburne Times-Review reported that Routh of Lancaster was arrested in Johnson county on a DWI charge. Public records showed Routh previously lived in Camp LeJeune, N.C., site of a major Marine base.And a picture of the suspect.
Update 2: One news source is reporting that he is an Iraq War veteran.