Role in current universe: investigator and troublemaker and chronic fedora loser (no seriously, he keeps losing the damn hat).
Backstory/Description of new identity: he won't say he can't be bought, but his price ain't cheap and he's not looking for a permanent boss other than himself.
Significant changes in personality/mannerisms: He's not playing up the ditzy hand waving as much as he does in the present day - he's much more contained.
Kinds of CR/RP scenarios you're looking for with this plot: Anything and everything. Hit me with your best shot.
Anything Else/: If you find his hat, don't steal the picture inside it okay? He'll shoot you if you do.