There have been several studies done that show how crimes are
reported is driving the numbers moreso than an actual drop in crime. Elected officials at the local level have a vested interest in crime numbers going down.
Short version without getting into local level politics is that I don't trust the numbers.
I think the National agencies are reporting the numbers they are given. And the people who give them those numbers need them to come down.
I don't think we are any safer today than we were 10, 20, or 30 years ago. If anything, criminals are more sophisticated and more brazen than ever.
In my area, a college town, criminals are literally kicking in doors, pistol whipping victims, and robbing them to the point that in the area behind the University people have been advised not to walk alone at night and even to hang out at a friend's house until your roommate returns so as not to he left alone in your own home. (How's that for a nice runon sentence?)
Of my child were a cop I would want her to have lots of big ugly equipment protecting her as she does her job. If you are doing no wrong, then the big ugly equipment won't be pointed at you.
As for crowded jails and drug dealers I think we should get away from jail time. What we should do is confiscate all of their property and sell it to pay for rehab programs and medical bills of addicts. Sure, you are free to go. But you can't take anything with you. Good luck with that.