It's not trivial to find that in the data. The cops are not required to keep the camera on all the time, or at least there is no consequence not doing so. They

It's not trivial to find that in the data. The cops are not required to keep the camera on all the time, or at least there is no consequence not doing so. They got the number from "administrative data", basically just police reports and civilian complaints, etc. Nothing related to the camera data at all.