1

Yorkshire Ripper

2

Murdered prostitutes and some other women

1975 onwards

1978

Several letters sent to the police

Cassette tape with the Ripper’s voice

“Yorkshire Ripper”

3

Believed to be genuine

Cassette tape

Voice on the tape

Police sent in the wrong direction

Strong Geordie accent

4

“Yorkshire Ripper” caught

1981

Peter Sutcliffe

7 attacks and 3 murders later

Tape and letters

Hoax

5

Hoaxer case reopened

2005

DNA extract from glue of the envelope

John Humble

Sentenced for perverting the course of justice