A SERIAL killer who denies murdering a 14-year-old schoolboy on the grounds of diminished responsibility showed no signs of mental health problems on the many occasions he was arrested by police, a jury heard today.
Steven Grieveson, 42, admits killing Simon Martin in a derelict house in Sunderland in 1990 after molesting him, saying he was afraid the teenager would tell other people about the “sex act”.
The jury at Newcastle Crown Court has heard Grieveson - convicted in 1996 of murdering Thomas Kelly, 18, and 15-year-olds David Hanson and David Grieff - claims an abnormality of mind meant he could not exercise self-control.
Grieveson has convictions going back to the age of 11, William Lowe QC, prosecuting, told the court.
At the time of Simon’s murder, Grieveson had 12 criminal convictions, and a further 13 by the time he was found guilty of murdering the three older teens.
Custody records from the early to mid-90s have been retrieved and no mention of mental health issues was recorded, the jury heard.
Last year the fairground worker, formerly of Roker Terrace, Sunderland, told police he took Simon to derelict Gilside House, had sex with him on a mattress, and attacked him afterwards.
“I started getting paranoid, I didn’t want anyone to know,” he told detectives.
“I lost myself for a couple of seconds. The next thing I knew, he was lying on the bed. He was not moving.”
The initial pathologist’s report found Simon was killed by a series of blows to the head. A later investigation found the teenager had also been strangled.
The trial continues.