I don't believe Phillip had any idea that we were cheating. I think he has too much integrity to stand for that. But then, I'm pre-disposed to think the best of a coach who brought us championships.
The one form of culpability Phillip can not avoid is that of command responsibility. The bigger a scandal is, the further up the chain of command it reaches. It seems the current scandal is big enough to warrant the removal of not only the head coach, but (more gently) the AD as well.
Note, I think Phillip was closing in on retirement anyway. I think the speed with which Donde found Danny White is circumstantial proof that Phillip had already told her he was getting close.
But he clearly would not have wanted to leave at that exact time, under those conditions. He was gently pushed out, almost for sure.
At the end of the day, I don't think you can call him a cheater. Just the guy who hired and led one.