In the real world, a highly confrontational attitude tends to attract trouble. So my intuitive analysis is that you have brought some of the problems on yourself. Even if the beginning was entirely not your fault in this regard, the continuation of the problem certainly seems to be, to some degree.
If Charles has issues with telling the truth, it is something he needs to resolve within himself and seek forgiveness for. I think that is obvious (should be obvious) for anyone. However I am willing to consider that he might have felt it was serving a higher purpose at the time, or that he was actually under a mistaken impression that it was true at the time. That's what happens in the real world.
Here is an Ansible article he wrote a long while back that you might find entertaining under the circumstances:
http://www.ansible.co.uk/Ansible/c_platt.html
... I don't believe in libel laws, because the only kind of printed statement that really hurts is the kind that exposes truth, and in the USA, truth cannot be libellous. People sue when someone offends their dignity, or when they take a statement more seriously than it was intended.
Ironically, by having his highly-paid lawyer contact you, Charles may have convinced you that he took the matter more seriously than was necessary. Hopefully you will both be able to laugh about it at some point thousands of years into the future.
While I agree that factual truth is important, in our fragile human frames it is a fact that we need to give each other time to cool off emotionally before we can handle even perfectly valid criticisms. I am sure Charles was hurting from the Larry Johnson events, as he was the one who suggested to hire him... It seems that much of the opposition that came your way was probably in reality backlash from that.
If it hasn't been suggested yet, I think cryo agencies need to have contractual arrangement with some kind of psychological counselling professional(s) to advise them staff members on conflict resolution both internal and external. We need to recognize the incredibly hard facts we are dealing with -- that everybody dies, and there is not much anyone can do about it. Cryonics is that "not much" -- we can only hope it will work (and work to increase that hope).