Essentially you just give one of the people's names here, other than mine obviously since I'm the host. Whoever you think the murderer out of you might be. It gets a bit more interesting after a few rounds because people need to start analysing what everyone does or who they vote and try to use that information to work it out (which is why, if this is popular, I think having a larger group would be more fun). Honestly, you're right in assuming it's just a random pick for the first round, since no one's done anything yet so you can't really work anything out.

Also, when you vote someone, I want you all to use the [@Mention] feature to do it. I just think it'll help get people's attention.