"The Junko Furuta case. Reading about it gave me nightmares. She was held captive for 44 days and basically tortured by her classmates. Some parents knew what was going on but did nothing about it. Since the criminals were juveniles at the time, they are free today."
That 100% death rate is not true actually.
At least one person survived.
Search for "Jeanna Giese" for more info.