On any given day, Zott and his staff don’t know which county officers are patrolling Metro or where they are stationed. “We have no idea what they do or where they go,” Zott said.

On July 4, after the federal Homeland Security officer reported he saw no county officers patrolling platforms, a Metro officer checked the cameras at the North Hanley station.

From 5:52 p.m. to 9:48 p.m., both the video and a memo from Metro indicate, there were five to 12 county police officers milling around in the security office at any given time. At 11:11 p.m., a county officer grabs an envelope, steps on a chair and covers the camera. A little more than an hour later, the camera is uncovered, and two county police officers leave the station.

The next day, the act is repeated by two county officers in the North Hanley security office. The camera is covered from 11:27 p.m. to 12:31 a.m.