Lt. Gov. David Dewhurst is responding to a recent Dallas Morning News article drawing negative attention to his opponent, Sen. Dan Patrick, for allowing undocumented immigrants to work under him 30 years ago.

“I’m shocked and disappointed at the hypocrisy of Dan Patrick. It’s just one more example of preaching one thing and doing something else,” Dewhurst said.

Dewhurst addressed the controversy while speaking to reporters at an early voting event in Austin Thursday. Sen. Patrick has said he wasn’t aware that four men working in his Houston-area sports bars in the 1980s were in the country illegally, and that the workers falsified their employment forms.

The information came to light after a private investigator hired by one of Patrick’s opponents, Land Commissioner Jerry Patterson, contacted one of the workers.

Sen. Patrick has made border security and illegal immigration key issues in his campaign, and the revelation sparked criticism from all three of Sen. Patrick’s opponents in the lieutenant governor’s race.