Unabogie
Philosopher
AFAIK, immunity can be filed for at any time, and more than once. Here is an example of immunity filed for and granted post-trial
http://jaablog.jaablaw.com/files/34726-32374/JarkasOrder1.pdf
So, afaik, there is no necessity in filing for immunity prior to the trial, nor necessarily any benefit. And I don't find anywhere that MOM or GZ has waived his right to file.
In your case, the defendant was acquitted. If George is a acquitted then I see no problem with him seeking immunity from a civil suit. But when he's convicted? First of all, do you really see Judge Nelson letting him go AFTER he's convicted of murder in her court? That's not remotely possible and it would be a travesty. Second of all, do you think that's why he's not doing this now, so he can do it after his conviction? If so, I don't think that's very wise.