William Dunlop has been jailed for life for the double jeopardy murder of young mother Julie Hogg.
Dunlop was told he would serve a minimum term of 17 years for the 1989 killing of the 22-year-old pizza delivery woman.
It was the end of a 15-year battle by Ms Hogg's mother, Ann Ming, 60, to have the law changed and get justice.
The case made legal history last month when Dunlop, 43, pleaded guilty to murder at the Old Bailey.
He was the first person charged twice with the same offence after the 800-year-old double jeopardy laws were changed.
Miss Hogg's disappearance in November 1989 was initially treated as a missing person inquiry until she was found 80 days later.
Mrs Ming found her decomposing and partially mutilated body behind a bath panel.
Dunlop was formally cleared of murder after two juries failed to reach verdicts.
But he was jailed for another assault and confessed in 1999 to a prison officer, boasting that there was nothing anyone could do about it.
The following year, he was jailed for six years for perjury - and charged with the murder again this year after the law was changed.
Mrs Ming and her husband, Charlie, 81, travelled to London from the family's home in Billingham, Teesside, to see Dunlop jailed.
