The cop was well within his right to stop this guy when he violated the law. However, most reasonable people would have let this guy go and then follow him to the hospital. Thats the right thing to do. I think it was bad decision by the officer....but what if the guy was lying? I mean, its turns out he wasn't...but how many people come up with BS excuses when cops pull them over? It happens to cops every day.
Even if we think the cop overstepped his bounds, No way in hell should this young cop be forced to resign, thats completely unfair. I think we have the benefit of hindsight here. If the mother-in-law didn't die, this wouldn't be a story.