My vote is that the Security Worker (Police Wannabe, FBI Wannabe, Detective Wannabe, FAA Inspector Wannabe) was "predisposed" to identify a pilot/s with alcohol breath.
If they tested zero, then we have to assume there was no alcohol on their breaths, or in their systems.
Therefore, the Security Worker's imagination/fantasies were out of control. Their focuses should be on the areas they were hired for, i.e. airport security.