OP, have you spoken with the other child's parents? Not in an accusing..your son is a bully...kind of way...just a word in their ear about the lack of supervision their son seems to be receiving from the so-called aide. If that was my child I would be in there asking for a review at the least!
I would NOT do this - it would appear that you are trying to make it all about another kid. I think you will be heading down the wrong path if that happens. I know in our school, if there is a conflict with another child, they recommend that you talk to the teachers or administration and by getting another parent involved, you create hard feelings. Adults have long memories while children get over things.
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You've gotten some great advice. First of all, make that list. Write down, if you can, by day, what has happened to your son and any punishment /consequences. Are all the acting out episodes around this other child ? Don't make that a focus, but be prepared for it in the back of your mind.
Do you have any emails from the teacher referencing any of this ? Anything written in a progress report/report card ? Bring them with you. I would also bring last year's report cards or progress reports showing the good behavior and how this year is clearly an outlier.
Have your goals written clearly. Don't make it about the other child - it is about your son, his behavior and actions and results. You CAN say, "Sometimes he doesn't make good choices when he's with other children in this class." The principal will know exactly what you are saying without you pointing fingers. You CAN say, "my son has heard that he will be punished for the exact same behavior that other children in the class are not punished for. I don't know or want to know any other children's details, but I am concerned about the example this is setting. I realize life isn't fair, but it is difficult for a 6/7 yo to understand this concept."
Focus on "this isn't a good fit". If you can make it through December, January would be a great time for a classroom switch. But be ready to fight for that - the administration doesn't want to do it, they don't want other parents to think it is a possibility.
We don't know all the backstory, but it sounds like you've got some issues. I would drop the specific "the para lied" thing. You won't win it, they'll just re-circle the wagons and you'll be painted as a troublemaker. Instead, if you really believe there are bigger issues and this classroom truly is not good for your son (try to look past the personality differences), focus on a positive experience for your son.
good luck. please update us about the meeting.