I'd also like to add this helpful tip I've picked up along the way. I like to call to 'Sound Trusting'. To put it plainly, I'll use an example; so let's say a boy and a girl are in the same room as me in murder mystery. I'm Innocent. We are just in standing in the room (which I know would probably get me killed but never mind), and we hear a stabbing death noise, and both the boy and the girl are right in front of me, perfectly alive and well. Because of that death noise, I can instantly trust them, because they can't be the murderer because the murderer was else where stabbing someone. The boy and girl can either be the sheriff, or just Innocent. I use this test a lot, and it does help a lot when you are the sheriff.