Paul Taylor has been sentenced to life imprisonment with a minimum 18 years, after being found guilty of murdering Sally McGrath from Peterborough.
Taylor was also found guilty of a number of serious sexual offences.
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The 56-year-old woman has been released under investigation after the body of an elderly woman was found dead
Tanya Benjamin had met the victim through a friend and withdrew up to £70,000 within eight days.
The Olympic swimmer is up against two other athletes for the British Swimming award.