(Associated Press) MOUNT CLEMENS, Mich. ? From a hospital bed more than 200 miles from the home he fled, Stephen Grant told police why, how and where he strangled and mutilated his wife, Tara, according to documents released Friday by prosecutors.
The family's 19-year-old live-in nanny, or au pair, also admitted to authorities in March that she had a sexual relationship with Stephen Grant, the police report said.
Grant said he and his wife were arguing in the upstairs of their suburban Detroit house Feb. 9 over what he said were her frequent work trips.
She walked away, he said, and he grabbed her wrist. Tara Grant then slapped him in the face, causing a scratch to his nose.
Stephen Grant, 37, told police he then hit his wife hard in the head and she fell to the floor.
Tara Grant, 34, told her husband that she would call the police, and he would go to jail for striking her, according to the account. The end result, he claims she said, would be that he would lose custody of the couple's two young children.
Stephen Grant told police that he then began to choke his wife. He said he covered her face with a gray-colored shirt or pair of underwear.
"She finally grabbed my hand at one point, but it was too late then and I couldn't stop," he said, according to the police report. "I knew I was going to prison. I panicked."
Grant said his children ? a 6-year-old girl and a 4-year-old boy ? never woke up during the nighttime altercation.
He told police that after his wife stopped moving, he placed a belt around her neck and tightened it. He dragged Tara Grantdown the stairs using the belt and tried to put her in the back of her sport utility vehicle.
The belt broke, he said, and his wife's head fell on to the concrete floor of the garage.
Grant said he managed to put her in the back of the SUV and covered her with a plastic liner.
Two days later, he said, he drove the vehicle to the nearby tool and die shop in which he worked. There, he attempted to cut her body with a tree saw, but it was difficult, he told police.
Grant said he vomited and drank alcohol to help him complete the task.
He told police that he broke band saw blades into large pieces, wrapped a rag around one end, then used them to cut the body into pieces.
Grant said he placed the head, torso and other body parts into plastic bags and loaded all of them into a larger container. He then drove to his Washington Township home with the body parts stored in the rear cargo area of the vehicle.