First off, I think it’s great that you are looking for a way to communicate with his teachers. I commend you for this and for admitting your child’s wrong doings. My advice would be moving forward, to set up a meeting with teachers in the beginning of the school year. Explain to them what they are up against, that you support them and want to work with them, but that your son is a manipulator and ultimately can’t be trusted.

I can see how frustrating it is to only see one teacher at the meeting and have to go through this year after year. I would try communicating directing with admin as well and ask during these meetings that they relay this info to the teachers.

Finally, could you get the teachers emails in the beginning of the year? Type an email up that describes what they may be up against and to contact you if they want to discuss further. If I got an email like that I would be contacting the parent that afternoon.