Soldier who won a Military Medal with the SAS, became a fearsome detective in Soho, and was later declared insane. Harold 'Tanky' Challenor - Telegraph
This is something that interests me from a professional view. When I first joined the "other" site, I had a long discussion with Morse about Jack Charles, the Spitfire ace who developed paranoid schizophrenia - was it due to his war experiences or not? The simple answer from current thinking to a very complex question, (and I'm not saying Morse necessarily agrees) is the Stress-Vulnerability theory. Some people are born with a certain degree of vulnerability to schizophrenia. A few people develop it in their teenage years having had no obvious stress in their lives other than exams etc. Others develop it after having a degree of stress - war, relationship breakdown, parental abuse, etc. But most people who have a horrific experience don't get schizophrenia, they get post-traumatic stress disorder. So probably Challenor was born with this tendency. But I also need to add that the very concept of schizophrenia is controversial!
In case people don't know who Jack Charles was: Jack Charles Whatever the causes of the illness one can well understand the amount of stress he must have been under during his service