Today, the sad thing is that they are beginning to not care whether they get away or not at all, they know how to "get away with it" and never be caught : they kill themselves.
Suicide seems like it's more the rule than the exception. It doesn't matter if it's done by the person or the police. Most of the killers want to go out in a blaze of glory. They don't care if they take no people with them. They don't care if they take a billion people with them. I'm referring to their suicides BTW. I always want the killers to be apprehended and prosecuted so that we can gain more insights into their methods and motivations. It might save lives.