Not guilty to murder on grounds of diminished responsibility
Guilty to all charges
Not guilty to murder
Not guilty by reason of insanity
Answer
Peter Sutcliffe pleaded not guilty to murder on grounds of diminished responsibility at his trial in 1981. This was because he was suffering from paranoid schizophrenia, which meant that he was unable to understand the difference between right and wrong.
Unmasking the Yorkshire Ripper: A Thrilling Quiz about Peter Sutcliffe