i think finding him/them would prolly be harder than solving the cypher i think finding him/them would prolly be harder than solving the cypherProbably wouldn’t be easy — and I personally would have no idea of where to start. Best bet is if the joker made the mistake of bragging about it to someone.
BUT...the entire thing is just an elaborate gag if there are only clues and no actual answer to be solved. If that’s the case, then finding the culprit would, needless to say, be easier.