 In March 1979 at Stafford Crown Court he pleaded not guilty to murder but instead pleaded guilty to manslaughter on the grounds of diminished responsibility . The plea was accepted by the prosecution , after psychiatrists gave evidence that he had an active paranoid psychosis . His indefinite detention was ordered by the trial judge , Mr Justice Stephen Brown , and he was held in Broadmoor Hospital and at Ashworth Hospital , both high security units . 
