you guys do realize that WoW said that people with useful roles will have limited uses. I don't see why we should encourage this type of behavior.
http://www.vgchartz.com/forum/post.php?post=3258328&page=3&postnum=23
I think any investigative roles would be best off waiting til night 2 unless they have unlimited (or a lot) of investigations. While we may clear 1 person tonight, it might prevent us from investigating someone who is actually suspicious on night 3 or 4.