Can you just imagine eavesdropping on the writers, sitting around, trying to decide who they should have be the killer? How about Alex,,,,,no, we got plans for him later on. what about Kristen?....good one...wait, Kristen doesn't ever do her own really dirty work. What about Chad..nahhh, we've had had him too much in love with her. Which character isn't serving any purpose now.......what about Clyde? Yeah, that's good, he's a really bad guy to begin with.....we can invent some dumb reason, most will accept it, others will roll eyes, but who cares. Clyde it is.