Nth Mastin for his article on cop gameplay.
I was the town cop in that game which spurred the MD discussion, and I would consider Mastin's original post (and subsequent MD post) the equivalent of a quantum leap forward from the game theory I (and I suspect many other cops, especially new-ish ones) had been using earlier in the game (which was, basically, investigate a hard-to-read player, but with no thought as to LyLo competence, or even durability to make it to LyLo to begin with). Even though some more experienced players might say, "well, yeah," I've looked at enough games with sub-optimal cop play to see that Mastin's contribution was a needed one.