Hi........my P is a daughter.and we were unaware of her devastating  habits until very recently.and that was only after she moved  out of the family home aged 19..........and things have gone from bad to worse ever since. She has always been a diffcult kid......but it hit us like a brick when the awful realisation finally kicked in with us. you don't say how old your son is.......P here is the expert at maniupulation and lying.and also stealing but so far she hasn't ended up in jail but I feel that is next on the cards for her....only a matter of time before she steals from someone outside her  family....for the most part, we were unaware of the extent of the stealing lying and manipulation.......but now we all see it plain as day.and its horrible.