The level of violence recently displayed by police suggests to me that they may be using steroids.
I can personally confirm that steroid use is rampant in law enforcement, esp. in bigger cities. The departments do not test for them in drug screenings, and since it's more or less an old boys' club, they're not going to rat on one another.
When you have undereducated, roid raging warrior-wannabes with automatic weapons and ninja suits running around middle-class neighborhoods with tanks and flashbangs, you have a recipe for disaster. And since the fraternity of law enforcement is so tight, not a single one of them would snitch or dish info on any of their comrades. This makes for a completely unaccountable organization of thugs that operate on the gray lines and fringes of the law in the name of "public safety."
These SWAT meatheads blast heavy metal music through their heads before a raid in the same way a lineman gets ready for big game. And don't get me wrong, I love metal and was a lineman in college, but I have absolutely no aspirations to go running into a private home to execute a warrant; and even if I did, I'd make good and God damn sure that the address we were raiding matched the one on the warrant.
There will come a day of reckoning for these men.