Former soldier and builder Paul Taylor, 60, originally from Peterborough and now of Valentine Close, Fareham, Hampshire, was arrested last year following a cold case review.
Today, at Chelmsford Crown Court, a jury found him guilty of murder following 23 hours of deliberation.
He was found guilty of three counts of rape, one attempted rape and a serious sexual assault, which were all committed in the months leading up to Miss McGrath's murder
More top news
Mainly dry with light winds. Hot by Sunday afternoon.
Fire crews are tackling a fire in a shop in Sudbury town centre.
A convicted robber who raided a shop in Buckden was tracked down after police found his DNA on a hat dropped near the crime scene