Serial killer Steven Grieveson guilty of Simon Martin murder
A serial killer who killed three teenagers has been found guilty of the murder of a 14-year-old boy.
Steven Grieveson, 42, was convicted of murdering Simon Martin, whose semi-naked body was found in a derelict house in Sunderland in 1990.
He is serving three life terms for strangling Thomas Kelly, 18, and Davi
Simon Martin was found dead in 1990
Grieveson had denied murder at Newcastle Crown Court, blaming his actions on an abnormality of mind.
The jury heard that Grieveson, who did not give evidence, accepted that he did kill Simon Martin but claimed the death was accidental.
He confessed to the killing to police because it had "haunted" him for 20 years.