Associated Press
This photo provided by the Erath County Sheriff’s Office shows Eddie Ray Routh. He was charged with murder in connection with a shooting at a central Texas gun range that killed former Navy SEAL and "American Sniper" author Chris Kyle and Chad Littlefield, the Texas Department of Public Safety said Sunday, Feb. 3, 2013.

FORT WORTH, Texas — The Iraq War veteran charged with gunning down a former Navy SEAL sniper and his friend at a Texas shooting range had been released from a mental hospital about a week earlier and had been "acting a little weird," his brother-in-law told a 911 dispatcher in a recording of the call released Tuesday.

Shortly after the shootings, Eddie Ray Routh's sister told a 911 operator that her brother had come to her house and confessed to killing two people, according to a recording of the frantic call released by Midlothian police.

Routh, 25, is charged with one count of capital murder and two counts of murder in the deaths of Chris Kyle, author of the best-selling book "American Sniper," and his friend Chad Littlefield. He's jailed in Erath County on $3 million bail and is on suicide watch.

In the 911 call Saturday, his sister Laura Blevins told the operator that Routh is "psychotic" and she's afraid he will return to her house.

"I don't know if he's being honest with me," Blevins says, referring to his confession. "I don't know if he's on drugs or not."

Her husband told the operator that Routh was released from a mental hospital about a week ago and that he had been "acting a little weird." Routh's brother-in-law also tells the 911 operator that Routh was recently diagnosed with post-traumatic stress disorder.

Routh was taken to a mental hospital twice since last fall and told authorities he suffers from PTSD, according to police records. A member of the Marines Corps Reserve, Routh threatened to kill his family and himself Sept. 2.

Kyle and Littlefield apparently had been helping Routh work through PTSD, said Travis Cox, director of FITCO Cares, the nonprofit that Kyle set up to give in-home fitness equipment to physically and emotionally wounded veterans.

Kyle, 38, left the Navy in 2009 after four tours of duty in Iraq, where he earned a reputation as one of the military's most lethal snipers.