Roa, Cara: perhaps the reason the changed wolf didn't come forward is that s/he didn't want to die. Because as a known innocent, s/he would have been a prime candidate for eating in the night.
And no, it's not me.
Which brings me to my Saucie theory, which I wanted to wait on a while. It's more unlikely than the cannon-fodder one so I will stress it's only a theory - but maybe he was the changed wolf. And that's why he was killed. Of course, it would depend on how much the EW is allowed to guide his wolves.