The following article is taken from the UK newspaper 'Daily Mirror' Reporter Rod Chaytor. 17 October 2006. Dambuster Guy Gibson may have been shot down by friendly fire in a prank that went wrong, a book claims. The wartime hero's death was covered up by an embarrassed government, says historian Derek Brammer. Gibson - who led the 1943 raid on the Ruhr dams died when his twin-engine Mosquito fighter-bomber crashed into a hillside. For years it was assumed he had made a pilot error while escorting Lancaster bombers over Germany. But Mr Brammer spoke to a veteran who thinks he downed Gibson. He said: "Gibson was a prankster. One of his favourite tricks was to dive at a plane to check the gunner was awake. On this occasion it seems the gunner was awake and upon seeing a two-engined plane assumed it was German and started shooting." The veteran reported he had fired at a twin-engine and reported a possible kill. That was recorded in the log but a few weeks later his commanding officer ordered him forget all about it. "I believe that plane was piloted by Gibson. It would explain why it was seen falling in flames and why Gibson never reported any engine trouble. "He was a national hero and it would have been a PR disaster to admit he was shot down by his own side. "So the men were told to forget about it and the government claimed he died as a result of engine failure." Mr Brammer, from Lincoln, makes the claims in his book Thundering Through the Clean Air.