Texas Lt. Gov. David Dewhurst's (R) campaign manager is accused of stealing at least $600,000 and possibly as much as $1 million, the Dallas Morning News reports.

Kenneth “Buddy” Barfield is alleged to have overstated the amount of money held by Dewhurst's campaign in documents filed to the Texas Ethics Commission and using those reports to hide cash taken from the campaign committee. 

"The lieutenant governor was shocked and dismayed that a former senior trusted adviser would steal from the campaign account for his own personal gain,” Dewhurst spokesman Rob Johnson said in a statement. "The proper authorities have been contacted and we will work with them and trust that the matter will be handled appropriately.”

Barfield has been working for Dewhurst since 1998, when the lieutenant governor ran for Texas land commissioner. He also ran Clayton Williams's 1990 campaign against Texas Gov. Ann Richards (D) and worked with the billionaire Koch brothers in the state.

The missing funds are from Dewhurst's 2010 re-election campaign for lieutenant governor. But Barfield also ran Dewhurst's failed 2012 Senate bid, and that campaign is under scrutiny as well, according to the Morning News. Dewhurst lost the Republican primary to Sen.-elect Ted Cruz in a runoff.