I will have to disagree with it. That was not our only clue, it was merely our most reasonable one. I appreciate that the real cop did not get himself involved in this mess.
I believe that Syn is most likely an innocent, because they were ramdomly guiltied by a mafia member.
And furthermore, Kiyotaka has rushed in to vote Syn without considering they're framed. This can be because peter claiming cop was a plan, and Kiyotaka decided to follow along with the plan to lynch an innocent Syn.
##Burn Kiyotaka Ishimaru