Peter William Sutcliffe who later changed his name to Peter William Coonan, was a British serial killer known as the "Yorkshire Ripper." Sutcliffe was convicted in 1981 of murdering 13 women and attempting to kill seven others. He died in prison on November 13, 2020.
 
One page incomplete handwritten letter to his brother dated May 29, 2005 and hand signed at the top, P. Coonan.  When this was purchased from his brother who no longer had the complete letter.