Associated Press - April 29, 2008 2:15 PM ET

CLAREMORE, Okla. (AP) - A Claremore man arrested for the death of his 4-year-old stepson told police he punched the boy twice in the stomach for soiling his pants.

Steve Lockler Junior was arrested on a first-degree murder complaint.

The boy's name hasn't been released and the cause of death is still under investigation by the state medical examiner's office.

Police say Lockler called 911 to report the boy wasn't breathing and officials at Claremore Regional Hospital called police who say the boy was covered with bruises, abrasions and other evidence of abuse.

Officers say Lockler told investigators he became angry when the child soiled his pants and hit him twice in the stomach with a closed fist and later spanked him with a belt before the boy stopped breathing.