CARSON CITY, Nev. — The Nevada Supreme Court Monday has rejected the appeal of a man who was sentenced to life in prison for fatally shooting of his son in an apparent argument in a car in Las Vegas in 2009.

The Las Vegas Sun reports the court rejected Jerry Pough Sr.’s claim that the district court was wrong to allow him represent himself at trial despite the fact he was mentally ill.

Pough, who now is 61, maintained he was diagnosed with schizophrenia when he made his decision to go it alone at trial.

The high court said in Monday’s ruling that “nothing in the record suggests that Pough’s mental illness kept him from understanding the risks of self-representation” or making a voluntary, intelligent decision.

Information from: Las Vegas Sun,