Suspect said, 'I couldn't raise money for a funeral'
Suspect got to know the girl through Instagram
Pedestrian is unconscious with serious injuries, police said
Man had suffered wounds to the head and chest, police said
Man, 24, is believed to have leaped to his death from the 12th floor of an apartment building
Police found bloodstains in her vehicle
One man suffered a broken front tooth, police said
On Thursday, police accused Kazuo Sato of abandoning a corpse
Suspect said, 'I did it to help a middle school girl who was in need of money'