I'm pretty sure Mr. Crusoe is innocent. I don't even think he knows who the real killers are- if he did, why wouldn't he just up and kill them first? No, he probably has no idea who killed his Sunday, and that's why he's making us do all the work...
What Ms. LeMans said is right, we can't wait for the evidence to come to us. If we do that, we'll might have to wait until tomorrow, or even the next day for a conviction! Even though there are probably more of us with good intentions then there are killers out here, we stand a better chance of ending this ordeal by going on the offensive and getting a conviction. However, I do not mean that we should be rash in our decision; we should do our best to make sure that the conviction in question is in the best interests for the Town before voting.