Probably the same reason they have the highest incarceration rate in the world.
It edges ever closer to being a police state with each passing yr. Homeland security, wiretaps, unlawful arrest and confinement, lack of due process, the Patriot Act, the list is endless
I actually agree with your distaste for all these things........but they haven't contributed to increased murder rates, as those rates have fallen dramatically in the USA over the past 20 years.