A Douglas County man faces a second-degree murder charge after he said he thought he fired his gun at an intruder who turned out to be his own son.

Frank Leo Huner shot and killed the victim at a home on Elk Canyon Circle in Sedalia, the Douglas County Sheriff's Office said.

The Douglas County Coroner's Office confirmed the victim was 33-year-old Nicholas Huner. He died of a gunshot wound.

Frank Huner appeared in court Monday morning. He is out on a $50,000 bond. A judge has ordered him to relinquish all of his ammunition and firearms.

A 9NEWS reporter who was at the hearing said he appeared anguished and troubled, and kept putting his face in his hands.

Frank Huner is slated to appear in court again on Aug. 11.

Frank Huner has no previous criminal history, according to Colorado Bureau of Investigation records.

Court records indicate Nicholas Huner has a criminal history in Colorado dating back to 2001. He was sentenced to two years in the Department of Corrections for leaving the scene of an accident involving a felony in 2004.

He has also been convicted of possession of and cultivating marijuana and driving under the influence, and has been arrested for assault.