And the assassin is Naomi. 80% sure

I gussed Naomi and the rank 2 guy who brought his friend is the assassin. He's more supicious then Naomi too. "I didn't get a good look at his face" but the face he showned at the time wasn't a "It's all my fault face" it was more like a "I had to do it to em(with side affects!)" kinda of face. And besides he took the least important things from his friend. He's a supicious fuck and I don't trust him