- The gun range was in a "very remote area" with no witnesses, an official says
- The two men killed, Chris Kyle and Chad Littlefield, worked to help veterans with PTSD
- The suspect confessed to his sister, but not to police, authorities say
- Eddie Ray Routh is held on $3 million bond after being arraigned on murder charges
A former Navy SEAL known for claiming a record number of sniper killings in Iraq was one of two men shot dead at a Texas gun range, allegedly at the hands of a fellow military veteran, officials say.