A serial rapist who stole his victims' high-heeled shoes as trophies was sentenced Monday to at least 15 years in prison in Britain.

Prosecutors said James Lloyd had confessed to raping four women and attempting to rape two more over a three-year period in the 1980s. He dragged his victims off the street late at night and tied them up with their own tights before assaulting them, prosecutors said.

Lloyd was traced almost two decades later when a DNA sample given by his sister after a drunk-driving arrest was matched to evidence from the crime scenes.

Police who searched Lloyd's home and workplace found more than 100 stiletto shoes.

"Few sexual cases are more serious than these," Judge Alan Goldsack said, passing sentence at Sheffield Crown Court in northern England.

Goldsack ordered that Lloyd spend at least 15 years in prison before being considered for release.