The mother of Maxine Carr was found guilty today of intimidating a witness in the Soham murder trial.
Shirley Capp (61) was charged after she made threats to a female witness who gave a statement to police investigating the disappearance and murder of Holly Wells and Jessica Chapman in Soham, Britain, in August 2002.
The jury was told that Capp, who denied the charge, threatened the witness during a confrontation at the defendant's home in Grimsby.
Capp will be sentenced next month, a spokesman for Sheffield Crown Court said.
Carr, the former girlfriend of Ian Huntley who was jailed for life for murdering the girls, served half of a three-year sentence for obstructing police investigating the murders.
She gave a false alibi for Huntley, who got two life terms in December 2003 for murdering the 10-year-olds in one of Britain's most high-profile criminal cases in recent times.