Two-Time Rapist Trapped By Old DNA

A notorious rapist - who pounced on two young lone women in the 1990’s – has finally been caught and convicted after his DNA was taken when arrested for having perverted images.

Ex-cobbler Frank Joseph Watson, 47, of Gibbon Close, Borehamwood, Hertfordshire raped a 22 year-old in 1991 and an 18 year-old in 1997 – threatening to cut the second victim into pieces.

He was arrested on April 20 by Hertfordshire Constabulary and a routine DNA swab linked him to the cold case rapes committed in Potters Bar and Borehamwood, Hertfordshire.

On September 13, 1991 the 22-year-old woman, who was walking home along Darkes Lane, was grabbed and dragged to the ground by Watson.

Six years later, on August 21, 1997, Watson attacked an 18-year-old woman who had been out walking on Aberford Park, Brook Road.

He grabbed her from behind by the neck, and demanded: “You better lie down before I stab you, or I'll cut you into little pieces.”

Watson forced the victim to the ground and then raped her.

In both cases Watson, who did not know his victims, made off, leaving the women where he attacked them.



At the time detectives made extensive enquiries, and the two offences were linked.

Forensic evidence was gathered, however, it was not enough to be progressed because of DNA technology available at the time



The Metropolitan Police Cold Case Sapphire Team reopened the investigation in early 2011.

Watson’s DNA was matched with other samples taken during the course of the original investigation owing to the enhancement in forensic technology. 



Detective Constable Danny Maiden, said: “This case shows how together with our colleagues from other forces, offenders can be brought to justice even years after an offence has been committed.

“I give thanks to the hard work of officers and those who deal with forensic evidence, and pay tribute to both victims who have bravely given their accounts at court.

“I hope this result gives some sense of closure to the victims who have had to live with this horrifying ordeal for many years.

“This decision proves that men like Watson will not evade justice, not matter what length of time passes, and that the Met will continue to pursue criminals through all means available to us.”



Watson was convicted of both rapes after a five-day trial at the Old Bailey and admitted making and possessing indecent images. He will be sentenced on October 21.