Say I am trying to kill player a but hit player b instead but my intended kosable offence for player a where faluse and it was rdm would the crossfire for player b still count as crossfire or still rdm
So you're saying you were RDMing one person and hit another person while doing so? Crossfire only works if there was a reason to kill a person. If there was no reason for the intended victim, they are both RDM.
I believe what he meant was that "he had a reason he thought was valid to shoot player A, in the process of shooting Player A, he shoots player B" which yes technically would be crossfire, however if the reason you shot player A for turned out to be RDM it would be RDM on player B as well due to the fact that if you hadn't RDM'd player A, Then player B wouldn't have been in crossfire. I believe i said that as plainly as i could.
You really need to spend more time on these posts, noone can help you if they can't understand what your saying.
The way he phrased it, I thought it sounded like there was a KOSable offense attributed to A by someone else, which turned out to be false because the person who said it was lying; In which case he was following a KOS and so the crossfire excuse would be valid.