Schoolgirl's horrific gang-rape, torture and murder that sent shockwaves through Japan: How teen Junko Furuta endured 40 days of depraved abuse at the hands of four boys who burnt her alive then buried her body in concrete

Over the span of 41 days, the high school student was abducted by four teenage boys aged between 16 to 18, subjected to unimaginable abuse, repeatedly raped and ultimately murdered.