Prosecutors say a former professional football player sliced his wife's neck and then crawled on the ground outside their rented Utah condominium before flagging down a police officer.
Police say that early in the morning of November 2, they found McClanahan outside crawling on his stomach, covered in blood.
Anthony McClanahan, who was signed and then cut by the Dallas Cowboys in the 1990s but for whom there's no record of ever playing in an National Football League game, remained Monday in the Salt Lake County jail, where he has been held without bail pending trial in an unrelated child kidnapping case.
McClanahan was treated for minor injuries, including cuts on his face, neck, wrist, arms and torso, but investigators found no evidence that anyone else tried to get in their condo, nor did they find a baby.
After a "lengthy search" of the complex, according to charging papers cited by the Salt Lake Tribune, investigators found the condo with its door ajar and blood on the door and floor.
Anthony McClanahan's story about an attack on the couple and their "baby" quickly unraveled, court documents indicate.
Charging documents say she was killed with a small, sharp knife held on a nylon-cord bracelet.
His wife, KC McClellan, was found dead in the apartment with several knife wounds to her neck, along with carpet burns and defensive wounds on other parts of her body.
McClanahan had been charged with child kidnapping last month after authorities said he took his 8-year-old son from a previous relationship from his school in Arizona on October 3 and traveled with him through Nevada and Utah.
Keri's family told the newspaper that she and McClanahan had a history of domestic violence, which ended at least twice with Keri fleeing from her husband.
Keri McClanahan, who went by KC, had been planning to leave her husband but wanted to help him get on his feet first, her sister Heather Gauf said. The couple met previous year in Keri's hometown of Bellingham, Wash., where Anthony was working as a personal trainer at the time.
After the January 2017 wedding, they moved to Arizona together and began traveling to volunteer in hurricane-affected areas.
Gauf said McClanahan punched her sister in a fit of jealousy, adding that he would sometimes talk about to the effects of head injuries he suffered during his football career. An officer spotted McClanahan outside the hotel "crawling on his stomach", according to charging documents.
"She's such a sweetheart", said Gauf, who remembered her sister as an adventurous, athletic woman with a great sense of humor who leaves two children of her own. Gauf said she became concerned about her sister when Anthony wanted Keri to marry him soon after the relationship started. "He definitely dimmed her light so much, and it was really hard to watch".
McClanahan is being held without bail, and it's unknown if he has an attorney.