I have some loosely based evidence, and perhaps one person who may testify.
You have information at best, at worst you have nothing.
Whatever it is you possess, good or bad, isn't evidence.
A document, for example, only becomes evidence once it has been submitted to the court and admitted into evidence by the presiding judge.
Your information can also be challenged by the defendant's counsel once your lawyer submits for admission.
Its often a tortuous journey from your possession of that document before it becomes evidence in a civil trial.
I have also some screenshots of a program running on my phone very similar to his name. please help.
I'm sure your "jpgs" or "pngs" or precious in your eyes, alas, they are nothing more than treasured keepsakes until admitted at trial.
Even if you were to prevail in a lawsuit against the alleged interloper or defamer, you'd only receive a pretty piece of legal paper, embossed with a beautiful court seal, over which the judge will affix a signature, acknowledging that Danny Defamer owes YOU, Vincent Victim $500,000.
Yeah, you don't receive a check, cash, or assets the court has confiscated from Danny and gifted to you.
You must then endeavor, if you wish to get compensated for the wrong perpetrated against you, to collect the five "hunnert thousand Gs" from among Danny's assets.
Same thing, mate, even if the jury awarded you $3,000; you'd have to collect it from Danny.
Prevailing in any lawsuit is incredibly difficult.
Collecting five dollars of any judgment is often impossible.