He was getting his toes stepped on, and then they were dictating his defenses with the new hires that came in. Not sure if he was gone before this, but when you start hearing some things after the fact that some things were getting installed that he wasn't wanting, then see these quotes:
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I didn't hear him talk like that except after that Indiana game. Just very interesting. When you hire Snow and bring in Butler that verbally said he wanted to be a DC... there was just more going on than wanting to be back towards family. I would also point to Knighton being Rhule's guy but leaving with TW.