Although the term is not used during the proceedings, the 1795 trial of Sir Archibald Gordon Kinloch for the murder of his brother Sir Francis Kinloch, 6th baronet of Gilmerton under Robert McQueen, Lord Braxfield is one of the earliest clear examples of recognition of diminished responsibility.
During the course of the 20th century the courts began to limit the mental conditions falling within diminished responsibility.