Horrifying missed chances to stop the monster of Dunblane... and a troubling questions: Author STEPHEN McGINTY reveals shooter's hundreds of photos of boys in their pants, how he forced them to sleep in his van and punishment beatings

On the afternoon of July 20, 1988, PC George Gunn of Central Scotland Police was ferried on the mailboat across Loch Lomond to the uninhabited island of Inchmoan.