"I feel anyone who brings drug-laced food into the workplace is criminal," said driver Mark Hall.Hall contacted 10News as he went to the San Diego Police Department's Southeastern substation to file the complaint.Hall was among several drivers who ate the brownies and then got behind the wheel of an MTS public transit bus."I'm just glad no one was killed," he said.In an interview last week when 10News uncovered the story, MTS Chairman Harry Mathis said, "They were told to stay where they were. There was no danger to the public."Hall disagreed, and he said he received five different phone calls asking if he was feeling OK."By the fourth call, someone jokingly asked how [were] those brownies? You have to remember that by this time two other operators were in the hospital," Hall said.Hall received a letter from MTS officials requiring him to make an appointment with a drug abuse professional.Hall refused to sign the letter, believing that it's an admission of guilt."I don't want to have that kind of stigma; this was not my fault," Hall told 10News.Hall remains on unpaid administrative leave, but plans to look for another job.Police told him the matter is still under investigation.MTS officials said public safety is paramount to their mission, but officials would not comment further, calling the situation a personnel matter.