Unfortunately, nobody keeps track of how many unarmed suspects are shot in the back, or how many no-knock warrants go wrong. But there are some statistics that do support my thesis,
"In 1997 alone, the Pentagon handed over more than 1.2 million pieces of military equipment to local police departments."
http://www.cato.org/pubs/wtpapers/ba...paper_2006.pdf (Page 8)
"In a widely cited survey, criminologist Peter Kraska found that as of 1997, 90 percent of cities with populations of 50,000 or more had at least one paramilitary police unit, twice as many as in the mid-1980s.45 The increase has been even more pronounced in smaller towns: In a separate study, Kraska found that the number of SWAT teams serving towns with populations between 25,000 and 50,000 increased 157 percent between 1985 and 1996.46"
http://www.cato.org/pubs/wtpapers/ba...paper_2006.pdf (Page 9)
"In 1972, there were just a few hundred paramilitary drug raids per year in the United States.69 According to Kraska, by the early 1980s there were 3,000 annual SWAT deployments, by 1996 there were 30,000, and by 2001 there were 40,000.70 The average city police department deployed its paramilitary police unit about once a month in the early 1980s. By 1995, that number had risen to seven.71 To give one example, the city of Minneapolis, Minnesota, deployed its SWAT team on no-knock warrants 35 times in 1987. By 1996, the same unit had been deployed for drug raids more than 700 times that year alone.72
In small- to medium-sized cities, Kraska estimates that 80 percent of SWAT callouts are now for warrant service. In large cities, it’s about 75 percent. These numbers, too, have been on the rise since the early 1980s.73 Orange County, Florida, deployed its SWAT team 619 times during one five-year period in the 1990s. Ninety-four percent of those callouts were to serve search warrants, not for hostage situations or police standoffs.74"
http://www.cato.org/pubs/wtpapers/ba...paper_2006.pdf (Page 11)
Because I only had time to find one research paper on the matter, the quotes target only one portion of Law Enforcement. Should you wish I continue the discussion (although I believe that another thread should be created to do so) I would be happy to spend some time researching the matter and finding more information to present.
No-knock warrants, the militarization of law enforcement, etc. certainly are problems with the current manner in which law enforcement works. We can ignore it or we can address it.