Man's head had been severely beaten, police said
TokyoReporter
Police are questioning the man on suspicion of abandoning a corpse
Police seized about 700 sleeping pills from the suspect's residence
Police took the driver of the vehicle in for voluntary questioning
Momona Yoshioka had suffered dozens of stab wounds over her body, police said
Man is believed to have been dead for up to one decade, police said
Girl suggested to her family that she was running away from home
Case is being treated as abandoning a corpse
Management association voted to sell the building to the landowner earlier this year
One suspect said, 'I had no choice but to do it to cover living expenses'