There are laws that don't make sense and sometimes even the police sees that, ultimately they are there to help people.
Police officers are basically allowed to speed and they have to in instances where they have to catch up with a suspect who is fleeing. They have to be able to maneuver the police car at those high speeds so people would have to get out of the way. I would not call that breaking the law this the job.It is an officers job to serve and protect so there will be instances when some laws like speeding will be broken. It really depends on the situation and I don't think that those minor laws are a big deal as long as no one was hurt.
I think you should always operate by the book. That being said, I would give the officer in question the opportunity to come forward himself, that would lessen the impact of whatever the event was.