They don't go into the mug shot database. That's a separate digital evidence management system that holds all the video from body-worn cameras. Body-worn cameras would generally not be used, or no data would be used. The circumstances wouldn't arise. There is no connection between the body-worn cameras and the Intellibook system, no automated connection.
The only way to do a facial recognition off a body-worn camera image would be to lift the still, export it and then bring it into the Intellibook system through the process I described. That would be highly unusual, because if you're interacting face to face with someone, you don't usually need to then determine their identity through that kind of means.