Since You Asked...

I just received an account of outrageous conduct by police depriving a man of his guns several years back, with a request for my suggestions about what my correspondent could do about it.  Without giving anything away except no arrest was made or R/O issued, here is my response, and it pretty much tracks with what I tell everyone who contacts me with similar requests:

Unless you are willing to put in the time and money to force production of evidence, there's no way to document this. Back that long ago, it's not even for certain any docs got computerized, or if they're sitting in file boxes in some warehouse awaiting a record retention destruction date.

Without evidence, there is no way anyone but a lawyer can help you. If it's worth it to you, retain one. If he can come up with corroboration, there's a chance a gun group can then feel confident enough in the provability of your recollections to help with legal fees to pursue a lawsuit.

Will your witnesses sign affidavits? Can you and they name names of officers involved? Are they still with the force?

What state are you in? What's the state gun group there?

IF you go the legal route, clam up--don't say anything to anyone, even to me, as much as I'd like an exclusive story--and only release info that has been vetted and approved by your atty.

If anyone has any better advice, I'll forward it to him and start using it in the future.