My son M is really intelligent he could get good grades when he wanted to but I do think that he knows when he's lying at least most of the time because I could see in his eyes and if I kept on pressing him he would get angry and admit he was lying.  That's why he didn't like to be confronted by me.  My ex-husband is a liar one that lies all the time and for reasons sometimes just to make his life seem more interesting so even though I got divorced from him 26 years ago I still know what lying eyes look like all too well.  This program that M is in Rescare uses polygraphs a lot the way I was told and I really don't see how they are going to work on him.  He lies sometimes just for the sake of lying - for one thing he has always told everyone that we "stole" him from Chile not adopted??!!He has so many issues - I knew he was messed up for a long time I just did not realize that he was sexually abusing these girls - that was just beyond my comprehension - of course my husband and some others made me believe that I was just imagining his behaviors so I was always second guessing what I saw.  Even though it is so painful to be going through this at least I know now that what I saw in M was right and he has stopped  inflicting new pain on his victims.