Nathan Rawson, 25, forced his victim into a bush at knife-point while in Leeds
Schoolgirl, 15, feared Rawson would murder her as she fought for her life that day, but used her wits to take a picture of his face that would send him down
He was jailed at Leeds Crown Court after admitting a string of earlier crimes
Rawson had previously been convicted for a similar offence after he sexually assaulted and stalked a woman through the streets in February 2016