Why is this trail called Cop Killer???

This is the best Mountain Bike trail I have ridden in Pemberton so far! So much fun riding down that fast trail yesterday as you can tell! I know... The name of the trail is not the best but the story says that the builder was a police officer and he injured himself while riding it. Its own idea apparently. To lead me down Upper Cop Killer, a part of McKenzie Cruise and Lower Cop Killer, Kirk Mc Dowall , a very talented World Cup Racer. He has been two times national Champion of Downhill in Canada, got 1