Seems like there was a pattern of bad behavior, dating back at least to when he was AD at Colorado and again at UC, then USC. Sounds like it wasn't health issues or some coincidence that Bohn resigned at USC. And had he not left when he did, he would have been in some major trouble in Cincinnati.
BearcatReport - 'Toxic Atmosphere' at UC Under Bohn
Mike Bohn stepped down last week as USC AD, but reports have uncovered issues when he led the Bearcats.
cincinnati.rivals.com