He could be polite and charming; an entertaining talker who was popular with the men down the pub, attractive to women and apparently loving towards his children.
But behind the facade there was another Mark Bridger, a heavy drinker with a nasty temper and a violent streak, a man who felt he had failed to fulfil his potential and had woven a make-believe life around his mundane existence.
At first, his fantasies seem relatively harmless, if ludicrous. Bridger told anyone who would listen that he used to be in the SAS and had served as a mercenary in Africa and east Asia, his skills with a knife making him a deadly assassin. He even claimed he was licensed to carry a gun because he was on an IRA hit-list.
But as he approached middle age, his fantasies became darker and dangerous.
Bridger became obsessed by images of children being sexually abused, often sadistically. He was fixated with stories of girls who had been murdered by sex killers such as the Soham school caretaker Ian Huntley. And he began tracking the young girls and women of Machynlleth, in Powys, first via social networking sites, then in reality.
What is clear is that by the time he got to Mount Pleasant, Bridger had put together a library of images of child sexual abuse and pictures of girls who had been killed in notorious sex crimes.
When police raided his home the tape in his video player was paused at a brutal rape and murder scene from the slasher movie The Last House on the Left, the 2009 re-make of the banned 1970s film