Alright, based on that post, I'm assuming that you're claiming to be the former detective...
To the rest of the town questioning whether RB would or wouldn't have switched the role of detective, I can't say with certainty. But I think for the town, he might have.
Here's one of LChap's very early posts that had me a little concerned. It was his response to me and a couple other folks as to why he had been playing so oddly, apparently trying to get himself lynched.
If you'll notice the part that I bolded 'but lessons must be taught.' When I saw this, one of my first thoughts was, 'what if this guy's a PR and trying to get lynched just to prove a point.' It seems a little far-fetched, but I also play the game on another site and in my first game a townie played intentionally scummy 'to teach a lesson...'
So, if RB knew that LChap was detective and thought he might be intentionally trying to get himself lynched it wouldn't be that far out there IMO for him to consider moving the role. The only thing that I can't work out, though, is why he would have waited until after LChap had apparently begun to actually play the game to do so...
Not positive, but not out of the realm of possibility. A very unusual situation, as whether or not LChap is now innocent or mafia, his revelation serves no purpose other than to get himself killed?