Oh, Hiram Lodge. Obviously, as a sort of mob boss and former prison inmate, Hiram is a very obvious choice for the man behind the Black Hood. But there are a lot of reasons why he makes sense. First of all, he has the money and the connections to get this kind of inside information on the ins and outs of Riverdale. Obviously, the man behind the mask isn't Hiram himself; instead, it's likely a lackey or hitman he's hired as an associate.
It's hard to figure out why Hiram would pick the victims he has picked so far, but in terms of logistical work, he's a pretty strong suspect.
