Has been sentenced to life imprisonment on Friday.
Dennis McGrory, 78 now, and 28 when he committed the crime, was given a life sentence with a minimum term of 25 years and 126 days in prison.
McGrory had gone to the home of 15-year-old Jacqui Montgomery in Islington, north London to try and track down his ex-partner.
He then sexually assaulted, stabbed and strangled Jacqui and ripped out a page containing her aunt’s address from her diary.
Report by Hajariv.
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