Michigan athletic director Warde Manuel has said he felt “betrayed” by the Sherrone Moore scandal — after an investigation found that the school’s former football coach had engaged in an improper relationship with his ex-assistant, Paige Shiver. Moore was fired by the school over the affair, and faced prison time after storming into Shiver’s home and allegedly threatening to kill himself following his dismissal — he was instead given 18 months probation earlier this month. In a new interview