Paul,
Do you have a theory, and if so what have you found out that backs it up or negates it? Yes I have a theory
How do you think Romuald (Ronald)*Zak is involved? He's not now he's dead
An accomplice, competitor, or victim? Was accomplice now victim
Do you know if the accused or victims were connected to RZ? Dirty deeds
Are you asserting that he's the Mystery Man on the Rimmer CCTV? Yes
Do you know who this "older divorced man " is that his parents mention on their website. Are you asserting that he is the accused? No idea , they might be blind to truth .
Do you know who the former partner is who RZ parents mention that he was depressed about? Are you asserting that she is the accused second wife, or one of the CSK victims? Nil
I think you should put your theory up, and share you're evidence, or back off disparaging those that are trying to find some that fits the known facts, however successfully or not. IMO.