Katie44:
You've been at this for many a year now. Rather than answer your question about if any of us have seen this kind of behavior before in our addicted loved one, I would rather take the time to reiterate that you need to stay away from your son right now. With a person who has stolen as much from you as you say your son has, you have no business allowing him on your property much less letting him work for you.
I pray that your enabling stops for your sake and for your son's sake. Like others before me have said, we can love our children to death.
May I also suggest that you frequent this site for your own recovery, not to give the latest dramatic episode with your son.
May God bless you and your family Katie44, and may He bless us all as we watch our addicted loved ones slide into the abyss.