It's incredibly easy to get away with crimes, as anyone who's been the victim of a crime will attest. The justice system is pretty selective in the crime that

It's incredibly easy to get away with crimes, as anyone who's been the victim of a crime will attest. The justice system is pretty selective in the crime that it cares to solve. The criteria for pursuit seems to be: is it profitable? did it happen to an important person? or was it perpetrated by a person who doesn't matter? The police will happily spend hours sitting on the side of the road writing traffic tickets, but if a group of guys kick your ass on the street, good luck getting them to do more than fill out some paper work. Even if there's solid evidence, they perps still need to be people the police are willing to go after. Also, in America, it's already the case that ~40% of homicides go unsolved. It's almost a coin toss whether you'd actually get away with it.