LARAMIE, Wyo. (AP) — Assistant University of Wyoming football coach Willie Mack Garza has resigned after being charged with drunken driving.

The safeties coach was cited Oct. 17 and coach Craig Bohl suspended him Oct. 18. Bohl announced Garza's resignation Monday.

Bohl said defensive coordinator Dickert will go back to coaching safeties while Bohl's son, graduate assistant Aaron Bohl, will coach linebackers.

The Casper Star-Tribune reports Garza pleaded not guilty to misdemeanor DUI and speeding. Garza didn't have a listed number and couldn't be reached for comment Monday.

Garza resigned as Southern California's secondary coach in 2011 after an NCAA investigation into recruiting violations while he was an assistant at Tennessee in 2009.

Garza was an assistant to Bohl at North Dakota State from 2005-08 and hired at Wyoming in May.