Chris Kyle Murder: Eddie Ray Routh, Iraq War vet accused in shooting death of ex-Navy SEAL, on suicide watch

(CBS/AP) STEPHENVILLE, Texas - A Texas sheriff says the man charged with killing a former Navy SEAL and his friend was shocked with a stun gun and restrained in his jail cell after becoming aggressive.

PICTURE: Ex-Navy SEAL fatally shot on Texas gun range

Erath County Sheriff Tommy Bryant says 25-year-old Eddie Ray Routh is now on suicide watch.

Bryant says Routh also appeared ready to assault jailers Sunday night when they entered Routh's solitary confinement cell because he refused to return his food tray. Bryant says after using the stun gun once, jailers put Routh in a chair that restrains his arms and legs.

Routh is charged with fatally shooting Chris Kyle, author of the best-selling book "American Sniper," and his friend Chad Littlefield at a shooting range Saturday.

The sheriff says Routh has an attorney but hasn't met with him.

More on Crimesider
Feb. 4, 2013 - Chris Kyle, ex-Navy SEAL and bestselling author, fatally shot at shooting range, authorities say