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'''Trevor Birdsall''' was a friend of Peter Sutcliffe, the Yorkshire Ripper.
On the 15th August 1975 Trevor was with Peter Sutcliffe in a car in Boothtown, Halifax. Sutcliffe left Trevor in the car in order to carry out a brutal attack on '''[http://crimehub.co.uk/index.php?title=Olive_Smelt_-_Yorkshire_Ripper_Victim Olive Smelt]'''. Olive was brutally attacked with a hammer and sustained serious head injuries.
On the 26th November 1980 an [http://crimehub.co.uk/index.php?title=Trevor_Birdsall%27s_anonymous_letter_to_police anonymous letter] was received at the [http://crimehub.co.uk/index.php?title=Millgarth_Police_Station,_Leeds Millgarth incident room]. The letter, which was one of many being received at the time, suggested that a man called Peter Sutcliffe was the "Ripper". The author of this letter has since been identified as Trevor Birdsall a close friend of Peter Sutcliffe.