There are quite a few in the canyons in SoCal. Not sure what the criteria would be for extracting them, but likely it would be suspicious deaths or celebrity status ? I know of an old Mini that went over a cliff in Topanga Canyon in the '90s; it was extracted & sent to a salvage yard, but it wasn't more than a couple hundred feet down. No celebrities or death in that one; just stolen. So likely insurance wanted it to determine method of entry or something.