WARNING DISTRESSING CONTENT  

Nusrat Jahan Rafi, 19, was burned to death on the rooftop of her school in April

She was cornered by attackers who demanded she withdraw an allegation of sexual assault against her headmaster, then set her alight when she refused

Nusrat freed herself and tell of what happened before dying of her wounds

Three teachers and two local politicians were among 16 found guilty Thursday