Harvey Richardson, 77, wrote nine pages on how he reputedly killed 19-year-old Lorraine Jacob, Sky News reported Wednesday.

Decorators working in Richardson's home in Aspull, Wigan, found the letter along with a gun and newspaper clippings about the death of Jacob and the discovery of her body by trash collectors.

Richardson recently died of cancer.

The Daily Mail said that while the letter was brimming with details about the killing, police were proceeding cautiously due to the fact that the letter was neither dated nor signed. Detectives said they could not prove Richardson actually wrote the letter and could not rule out the possibility other individuals had been involved.