STEPHENVILLE, Texas (AP) — Opening statements are set to begin in the Texas trial of the man charged with killing Chris Kyle, the famed Navy SEAL depicted in the blockbuster movie “American Sniper.”

Former Marine Eddie Ray Routh is charged with capital murder in the shooting deaths of Kyle and his friend, Chad Littlefield, two years ago at a rural shooting range. Routh’s lawyers will pursue an insanity defense. The 27-year-old faces life in prison without parole if convicted.

Attorneys are expected to make opening statements Wednesday morning in the small town of Stephenville. Prosecutors have said their first witnesses will be Kyle’s widow, Taya, and Littlefield’s mother, Judy.

The Oscar-nominated film is based Kyle’s memoir. The sniper served four tours in Iraq.