The man who allegedly shot and killed the author of "American Sniper," Chris Kyle, and his friend, Chad Littlefield, was indicted Wednesday by an Erath County grand jury, according to District Attorney Alan Nash.

Eddie Routh, the former Marine accused of killing Kyle and Littlefield Feb. 2 at a gun range at Rough Creek Lodge was indicted for capital murder.

If convicted, Routh could face the death penalty.

"We are restricted by what we can say at this time," Nash said following the indictment.

Judge Jason Cashon has placed an order restricting law enforcement officials, the prosecution and defense from communicating with the media.

Nash said he does not know when a trial will begin.

Stephenville attorney Shay Isham and Fort Wort attorney Warren St. John are representing Routh.

Routh's family has said in the days and months leading up to the double slaying, Routh had been deeply troubled and had been at the Dallas V.A. Medical Center on Jan. 29 for an outpatient, follow-up visit.

His parents, Raymond and Jodi Routh, had reportedly begged the hospital not to release their son the week before because he was suicidal and they feared he would hurt someone else, Isham said in a previous interview.

Kyle was a former Navy SEAL who served four tours in Iraq. He was dedicated to helping veterans with post traumatic stress disorder, a condition Routh was reportedly struggling with.

Jodi Routh had reportedly sought Kyle's help with her son's treatment.

Kyle and Littlefield had taken Routh to the gun range for a form of therapeutic target practice when Routh turned on the men, shooting and killing them both.

Routh is being held on a $3 million bond at Erath County Jail.