I think the 4th game has nothing to do with the murder. That's why Purple Guy is only in an easter egg scene. The 3rd game was about the murder, the 4th game is about the Bite of 87, the other horrible event of the Pizzeria. They are two horrible, separated events.

Five nights at Freddy's fanart - the purple man.You can buy some cool items (like iPhone cases) with this image in my RedBubble shop: www.redbubble.com/people/ladyf… I have to make clear: I don't think Phone Guy and the Purple Guy are the same. I have several reasons - and not just because a, I like Phone Guy and I don't want him to be a murderer, b, I want to keep them as two characters because that means more characters to drawAnd some SPOILERS for the 4th game (If you want to know more, visit my journal:SPOILERS