There were suspicions, but nobody knew for sure whose side Eddie Villarreal was on until the night he pulled over the two FBI agents.
By day, Villarreal was a Dallas Police officer. By night, he had a different job —  moonlighting as a security guard for Alfredo Hinojosa, a nightclub mogul who federal authorities suspected was involved in a cartel-connected drug ring.
Inside the restroom stalls of three of Hinojosa’s clubs, dealers sold hundreds of small bags of cocaine every weekend, according to federal court records. Agents suspected Villarreal was protecting the owner’s enterprise. To test him, they tailed one of the club’s leaders to see if he interfered…