New police dash cam - roof mounted


So in light of a recent news story where a police dash cam did not capture a whole event since it took place on the drivers side door of the police vehicle. Why not have a new type of camera on police vehicles. No longer dash cams but a low profile roof mounted camera system than cam see 360 degrees. The technology is there, Google uses it, Bing uses it. Even the standard cell phone with panoramic mode has this technology built in. This way it could record from every angle possible. There would be no excuses. Also make it tamper proof and always on recording so that not even the police could disable it. It would be a hexagonal pattern on the roof with coated lenses at an angle.