Here in West-Germany some offer "TSCM sweeps" for cars but they are not just private investigators they are all tied to a more central system

Its best to keep a few central guys befriended

You don't want to deal with crash teams.. they use ordinary civilians for that , even house wives and immigrants, unless you are a HVT you will not get the muscular A-Team guys with their black SUVs.... that is only movie stuff not real world