INVESTIGATORS have told how the estranged wife of World’s End killer Angus Sinclair was instrumental in helping police bring her husband to justice.
Sarah Hamilton, 64, spend a year secretly working with officers after her husband was cleared of murdering teenagers Christine Eadie and Helen Scott in 1977.
For a year, she penned letters to Sinclair hoping he might make an incriminating slip-up or confess to the crimes.
Ms Hamilton was 20 when she married Sinclair in 1970 at a registrar’s office in Leith.
A senior police source said: “She was a young student nurse when she met him. She could be seen as a kind of victim.
“She never knew what he was up to. We were part of her life for about a year.
“She went through the mill to help to the extent she wrote letters to him trying to get him to confess.”
Ms Hamilton left her husband in 1982 after he pleaded guilty to the sexual assault of 11 children.
Sinclair was jailed last week for 37 years after being found guilty of raping and murdering Ms Eadie and Ms Scott.