ODESSA - The trial for a man that says he killed Satan is underway.
A jury was seated for the trial of James Williams.
Back in 2010, Williams admitted to stabbing 59-year-old Antonio Villa in the chest.
Villa died a few hours later.
It happened at an apartment that houses mentally challenged people.
A witness says Williams stabbed Villa while referring to him as "Satan."
Williams has been charged with first degree murder.