What's the point of cops?

Kenny and I were at a redlight today behind this white car(?eclipse?) it had Hot Mama Grad on the window in shoe polish. We were #3 in line. The light changes to green the white car goes to the left into the oncoming turn lane to pass the car in front of him, all in the intersection. !!!!! There was a cop passing the other way. I saw him look at that car. So we continue on our way. The cop never came after him. I would have so gotten a ticket if it had been me. Obviously that guy was special. The crap of it all was the guy that passed didn't even go anywhere he ended up only like 5 car lengths ahead of the car he passed. He wasn't in a hurry or anything. ... I just don't get it.