i think when its 2 or more you need to wreck the cars down to 1
but at 1 you can just hide or outrun them...
outruning them is hard though because police cars are so common that you run into new ones all the time
the whole cop car killin isnt really a brawl though
when you drive real fast down lanes the cars will crash themselves...and a little push helps allot
you just need to make m crash into walls
cop cars are really weak for some reason too