ANCHORAGE, AL — A murder mystery that started in a Mountain View apartment Wednesday night ended the next morning with the discovery of the suspect's decapitated body at Point Woronzof.

He'd rigged his seatbelt around his neck and around a parking post, then stepped on the accelerator.

Investigators say 26-year-old Jonathan Kyakwok stabbed his mother, 46-year-old Elisabeth Nicketa, then took his own life in a bizarre way. Nicketa was found stabbed to death in her apartment on 400 North Bragaw just before 9 p.m.

Police say she lived with her son, who left a big clue at the scene.

"He left a note inside the house and the note indicated that he had killed his mother, he wanted to die and was going to go to Seattle," said Sgt. Ken Spadafora, Anchorage Police Department homicide detective.

But Kyakwok didn't go to Seattle. A passerby found his car at Point Woronzof Thursday morning. In a gruesome suicide, Kyakwok had rigged his seatbelt around his neck and around a parking post, then stepped on the accelerator, cutting off his own head.

Police say they've never seen anything like this, but they aren't surprised the suspect killed himself. "It was one of the possibilities we'd anticipated," Spadafora said. "He gave us a heads up [No pun intended, I'm sure ...] that he was suicidal so we figured if he really was suicidal, it would happen here in town or maybe along the way out of town."

Investigators say they've learned that Kyakwok and Nicketa had a history of arguing, but police don't think they'll ever know what led a son to kill his mother and then himself.