I'm voting Echo basically out of process of elimination:
0_o is innocent.
SFG is obviously cleared
adam I am fairly certain is the cop
Derekku I have a good feeling about (probably because of the twilight brownie weirdness)
strager I don't find that suspicious, from what I can tell he's acting like he always does
Lucidity I am mildly suspicious of, but he did gain some points for resisting to change his vote to adam when the day could have ended at any time
This leaves Echo. I can't really find anything that makes me believe he is innocent. adam also pointed out his different behaviour
here, which is also a factor.
EDIT: strager, adam said in the post that I linked in my last sentence that he scanned himself and got Innocent