On Saturday Officer Karl Romero was keeping an eye on surveillance cameras around the station when he spotted something outside.
Officer Romero reported to his supervisor what he thought to be a #ghost walking across the secured police lot, right through cages and a gate.
Detectives said there is no way in or out of the secured area without the gates opening and an alarm sounding. Police said they hear strange noises and see unexplained images in the lobby of the building, too.