Man found guilty of murdering his ex-girlfriend in Stonebridge
- Credit: Archant
A man has today been found guilty of stabbing-to-death his ex-girlfriend in Stonebridge after they rowed over their son.
Marvin Samuels, 31, of Conduit Way, Stonebridge, knifed Sharlana Diedrick 16 times as they argued while sitting in her car parked near his home in Wybourne Way, on September 29 last year.
The Old Bailey heard he carried out the murder hours after raping a dog walker at the Welsh Harp reservoir in Neasden.
Samuels claimed he was ordered to kill both women by evil voices in his head, including one named Tommy.
But prosecution psychiatrists disputed whether he was suffering from paranoid schizophrenia at the time of the attacks.
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He had admitted rape and causing grievous bodily harm with intent after battering the woman around the head with a branch and throttling her with her own scarf.
He had also admitted the manslaughter of Ms Diedrick, 32, a mother-of-four originally from Derby but living in Watford.
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He was convicted of murder and cleared of the attempted murder of the dog walker.
Samuels has a history of disturbing behaviour going back to the age of nine when he took an overdose.
After a second overdose at 13, he was referred to a consultant child psychiatrist because of his problems wetting and soiling the bedsheets.
At 15 he was diagnosed with anorexia and earned a conviction for theft.
He went on to be convicted of robbery, wounding with intent and assault on police and was also found guilty of battery against Ms Diedrick during their turbulent on-off relationship.
While on remand Samuels had to be locked up in isolation at Broadmoor Mental Hospital after attacks on a fellow patient and a member of staff.
Judge Timothy Pontius adjourned sentence until October 14, for his psychiatrist to be present.