I guess the necktie is a clue although it doesn’t really seem like that is the method of murder since it just seems to be draped around the neck, not wrinkled or tight, just laying there like a scarf.
But if I see Eric again wearing a necktie which he never used to wear, and which I might add Chad NEVER wears, I might put him even higher on my suspect list. Although was the necktie the same color as the one around Serenas neck?