McGuire was charged with driving while intoxicated and booked into the Tarrant County Jail at 4:40 a.m. Friday. He bonded out Friday afternoon.
Cedar Hill ISD said it was aware of the incident, McGuire informed his bosses on Friday, and was still in the process of gathering information. CHISD said it would handle any discipline internally.
"Coach McGuire is aware of the impact this will have on the CHISD Community, Cedar Hill High School and the football team he coaches. He will be addressing this matter internally within the football program," the district said in a statement.
"It's a little disappointing because a lot of us look up to him," said student Genesis Branwell.
Parents like Andrea Massinburg say for the popular coach, honesty will be his best defense.
"Address it," she said. "Address it. Don't hide. Address it. Let the kids know he's an adult. He makes mistakes…just like he leads on the football field, he needs to teach the kids to do the right thing. He has to do it also when he's not at school."
McGuire was named head coach of Cedar Hill in 2002 and has turned the program into one of the most successful in the state.
The Longhorns have won three state titles – 2006, 2013 and 2014.
McGuire was recently offered a job on the staff of Charlie Strong at the University of Texas, but he turned down the offer.
No one answered the door at his Midlothian home Friday night when FOX 4 knocked.
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