TULSA, Okla. (KFOR) – A man has pleaded guilty to a murderous love triangle in Tulsa.

On January 4, officers from the Tulsa Police Department were called to a home in the 3800 block of S. 28 W. Ave. to check on a resident’s well-being.

When police arrived at the scene, they found 29-year-old Sarah Maguire dead from blunt force trauma.

Investigators soon realized that Maguire’s car and other personal items were missing from the scene.

Maguire’s car was eventually found in Fayetteville, Arkansas with two people sleeping inside.

Arkansas authorities have arrested Brinlee Denison and Nicholas Johnson on charges of auto theft and first-degree murder.

According to a probable cause affidavit, Johnson said he and Denison were in an intimate relationship. However, he said Denison was also in a relationship with the victim, which made him jealous.

Johnson told detectives that Denison knew they were going to assassinate Maguire and that she helped plan the crime.

In a disturbing twist, investigators say Denison and Johnson became intimate in the victim’s bed after attacking her with a crowbar.

“He said he could still hear the victim in the living room struggling to live,” the affidavit reads.

Johnson told detectives that Denison took various electronic devices and credit cards from the victim’s home and used them several times on the way to Arkansas.

FOX23 reports that Johnson waived his right to a jury trial and pleaded guilty to first degree murder. He faces life imprisonment.

He is due to be sentenced on July 21.

Denison will go to court on June 13.