 On 12 December 2014, Colin Ash-Smith was sentenced to life imprisonment with a minimum of 21 years for her murder.He was already 18 years into a life sentence for two other non-fatal stabbings.Claire Tiltman, a Year 11 pupil at Dartford Grammar School for Girls, took a short cut down an alleyway on her way to meet a friend near her home in Greenhithe.