Agree. The Dean O'Dell has more possibilities - one, we got to know and like the Dean. Veronica has a stake in it, because she may have inadvertently caused it by telling about the affair. And two people she cares for could end up suspects: Weevil and Keith.

Also agree on the rapist storyline - the big problem was it didn't really affect the main characters that much until Veronica started investigating it. Didn't have the emotional resonance you need to pull viewers in, also it's a retread of a prior storyline which I think was done better in S1 and 2.