Man charged in near-decapitation that killed trooper's son

STILLWATER, Okla. - Prosecutors in Oklahoma have charged a 21-year-old man with first-degree murder in the killing of a man who was nearly decapitated.

Isaiah Marin of Stillwater was charged Thursday in the attack that killed 19-year-old Jacob Andrew Crockett a day earlier. Police say Marin was arrested Wednesday afternoon after he called authorities and said he had murdered someone. They say they were able to track him down after receiving a number of phone calls from people who reported seeing a man covered in blood carrying a large knife, reports CBS affiliate KWTV.

According to the station, after his arrest, Marin informed police of the location of the crime scene. Police say in an affidavit that Crockett was located at an apartment in Stillwater. They say he had multiple stab wounds and that his head was "mostly severed" from his body.

According to the affidavit, a witness told police that Marin and Crockett previously had disagreements because Crockett allegedly practiced witchcraft and Marin "had strong Christian beliefs." Crockett was the son of an Oklahoma Highway Patrol trooper.

Police say Marin admitted to fantasizing about committing multiple homicides, reports KWTV.

Marin is being held in the Payne County jail without bond. Court records don't list an attorney.