A 17-year-old teenager arrested on suspicion of killing and beheading his mother in Fukushima Prefecture was sent to prosecutors Wednesday after evidence was found in his apartment suggesting the murder was premeditated, investigators said.
The woman's dismembered body was found Tuesday on a futon in his apartment in Aizuwakamatsu after the teen showed up at a local police station with the head and said he had killed his mother. A kitchen knife was found near the body.
Although earlier reports said the knife was believed used both to kill the victim and behead her, the youth later told police he purchased a handsaw before the murder, police said.