Neighbourhood Watch

Julian Fairfax Mayhem heard something very disturbing today by a beautiful young woman as she breast fed her absolutely gorgeous three month old baby, Lily. Her six year old boy had been invited to play with his friend's penis, his friend also being six years old. Julian seemed to remember playing with the bum of her neighbour's son when she was about six, but times were different and much more worrying and anxiety ridden. They spoke to the parents, and they admitted that he had done it before.

The problem being the father, who had been seen around the neighbourhood between the hours of 11pm and 3am in a pair of boxer shorts looking in the windows of families close by. He had a penchant for young girls, and would tend to man-handle himself in a not so appropriate manner. He would not be averse to standing under lit lamp-posts, another strange quirk in an unhappy, psychologically damaged individual, who was as pleasant as pleasant to meet. A nicer man you would be hard pushed to find.

"Mal. Come on in, luv, let me make you a cuppa, or would you prefer a beer?", this being Australia after all, beer for breakfast, lunch and tea.

Jasmine had spoken to policeman Tony, who lived in the corner house, and he basically has his hands tied.
"He needs to be caught in the act", Tony said. His wife, Angela, nodded wisely.
"I watch 'The Bill',"said Maralyn, "You can video him, no problem",

This neighbourhood has a problem. What can ordinary people do? Mal has been questioned by the police and denies everything. Seems like we are helpless in the face of adversity. Comments invited on this one please.