Background to case
Hanratty was charged with killing Michael Gregson and raping and wounding Valerie Stone on August 22nd 1961 in a layby on A6 near Slough. This case came to be known as the A6 murder. After his trial and sentencing Hanratty was hanged at Bedford prison on 4th of April 1962, his remains were subsequently reburied in Carpenders Park cemetery.
In March 2001 his remains were exhumed so that DNA sample could be taken. Results showed that they matched two samples taken from the crime scene, and that there is a 2.5 million to one chance that these samples came from someone other than Hanratty.