War hero and author Chris Kyle, a U.S. Military sniper who earned two silver stars and five bronze stars, was killed not on the battlefield, but here at home. Chip Reid reports.

Military sniper Chris Kyle had survived the dust-worn places where he had to worry about enemy fire — or even friendly fire — until this weekend.

Kyle, 38, an author and former Navy SEAL, was shot dead Saturday by an unemployed, 25-year-old Marine veteran, Texas officials said Sunday. Kyle's friend Chad Littlefield, 35, was also killed. No one witnessed the shootings, authorities said.

The suspect, Eddie Ray Routh, used a semiautomatic handgun to shoot Kyle and Littlefield multiple times at a secluded gun range at the Rough Creek Lodge southwest of Fort Worth, investigators said at a televised news conference. Routh is in custody and is expected to face two capital murder charges.

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Routh had enlisted in the Marines in 2006, deploying to Iraq in 2007 and to Haiti in 2010 for hurricane relief. He remains in the Marine Reserve.

After Kyle left the Navy in 2009, he wrote "American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History." During his four deployments to Iraq, he wrote, he'd recorded the most confirmed kills of any American sniper — more than 150.

Back in the States, Kyle was known to take troubled veterans to gun ranges as part of giving back — shooting and hanging out as a kind of therapy.

"The shooter is possibly one of those people," Erath County Sheriff Tommy Bryant said at the news conference, hinting that Routh's mother, a schoolteacher, may have reached out to Kyle to get help for her son. Officials couldn't confirm whether Routh had suffered from post-traumatic stress disorder.

Routh appeared to be one of the nation's numerous unemployed veterans, and Kyle was one of those who left the anonymity of military service and entered the public sphere.

Kyle's autobiography was unapologetically politically incorrect: During one visit home between deployments, he got a tattoo of a crusader cross on his arm.

"I wanted everyone to know I was a Christian," Kyle wrote. "I had it put in in red, for blood. I hated the damn savages I'd been fighting. I always will. They've taken so much from me."

Kyle won adulation and a spotlight and appeared on the NBC reality show "Stars Earn Stripes," in which "celebrities are challenged to execute complicated missions inspired by real military exercises."

In an interview last year with Fox News' Bill O'Reilly, Kyle claimed to have punched former Minnesota Gov. Jesse Ventura in 2006 for "bad-mouthing the war, bad-mouthing Bush and bad-mouthing America."

Kyle was president of Craft International, a military and law enforcement training company. In a statement lamenting the slayings, the company identified Littlefield as Kyle's trusted friend and said they died trying to help "a troubled veteran."

News of Kyle's demise spread quickly through the Navy SEAL community, according to Rorke Denver, a reserve SEAL team lieutenant commander based in San Diego, who served with Kyle on SEAL Team 3 in Iraq.

"We're such a small brotherhood that when something happens to anybody here or overseas, word travels fast," Denver said Sunday.

Denver said the news was "really hard to believe," and he called Kyle "one of our real champions and battle stars."

"I knew Chris had been working with other veterans, folks with PTSD, trying to help them get better," Denver said. "It's hard to stomach that someone he was trying to help would turn on him."

Denver said he had been fielding questions from civilians who couldn't understand why Kyle would have taken someone with PTSD to a shooting range — but as a veteran, he understands.

"That type of shooting can actually be cathartic, calming," Denver said, "letting your heart settle," particularly for veterans who have just returned home after being accustomed to carrying weapons.