With the death of PD, huge suspicion on Colin. I think PD did mention about getting a fair idea about who is who after this night. And, he would have Colin as the prime suspect if he (Colin) survives the night. Not a strong reason but, yeah. Also, now when I look back at those posts of his, earlier in the game, they do seem desperate.
Lynch : barmyarmy
And yeah, 3 votes for a lynch, not 4. My bad with my c/p