Junko Furuta was a Japanese high school student. She worked part-time at a factory to pay for a graduation trip. Junko had already accepted a job, post-graduation. Unfortunately, she would never make it. Instead she was tricked and held captive, abused and tortured for over 40 days before her body could take no more. Dying before she even got to live. The perpetrators were four boys. Who, after killing her, finally realized they may get into trouble and so they discarded her in a barrel as trash near a construction site. Months later, after an arrest, one of the boys tells police where to find her body after he incorrectly believed one of his accomplices had already admitted to the crime.
Sources:
https://timenote.info/lv/person/view?id=4369916&l=en
https://vocal.media/criminal/the-brutal-murder-of-junko-furuta-mbig03xv