There is an amazing program I have used called "The Total Transformation Program" on the empowering parents website. It is expensive but well worth every dime. It focuses on aiding children who struggle in this way. I have used it myself with spectacular results in working with many children and parents through the years. I highly recommend it. The man who developed the program did so after going to prison and
can get inside these kids heads.

On another note. We are not talking about a vulnerable 13 year old boy. We are talking about an abuser, manipulator and future resident of the prison system. It is vital you look at your son as he is now, now who you want him to be. He will have positive traits but those are being shadowed by his lack of skills in getting his needs and wants met in a straight forward and healthy manner. The other thing he is lacking is accountability imho from the posts I am reading.

There is also an amazing book called "In Sheep's Clothing" by George K Simon that addresses manipulation in children in one chapter as well as a book called "Cleaning House: A Mother's 12 Month Experiment in Ridding Her Home of Youth Entitlement". I forget the author but it isn't hard to look up.

If I were you I would start with the Transformation Program. They also have a help line that you can call anytime to gain support from professionals in the field. I have used it often and they are great. The first month of it is free with the program but after that is a paid service. It's a start though.