Well, from that scene I can say with a straight face, that Amuro is Bourbon. Scar Akai has appeared before Sera and Okiya. Scar Akai is obviously Bourbon in disguise because Gin called off the snipers (I love Korn, I find him adorable, but I hate Chianti). Vermouth is on the phone with Bourbon while Conan is kidnapped. Which finally narrowed down Bourbon down to three people. (Okiya, Sera, or Amuro) Since Scar Akai has appeared before Okiya and Sera, who does that leave? Just saying.