@Blickers,
Of course plaintiffs are bound by the law. Proof which comes from illegal searches and seizures is contestable. Again, I repeat, the standard of proof is far lower. You've probably seen it in reverse, e. g. where a criminal case is won and then a related civil suit is filed. Going in the opposite direction doesn't help the DA much at all.
The DA or the cops or both found either there was no reason to go forward or the plaintiff decided not to go that route. Whatever happened, for whatever reason, that avenue was not explored.
Seriously, this is straw-clutching.
There are lots of other reasons to go after Trump. This does not appear to be one of them.