A real estate executive was stabbed in the abdomen and back with a knife
TokyoReporter
Gender and approximate age are unknown, police said
Police used security camera footage to link the suspects to the theft
Boy surrendered to police on Saturday morning
Girl said, 'I couldn't tell my parents'
Twelve persons were hospitalized after the incident
One of the bodies had already turned skeletal, police said
Suspect was in custody for possessing methamphetamine
Mami Fukuda denies the allegations
Evidence found at the scene suggests the person died due to suicide