This is why she's the best (with a notable assist of Kevin Drum).
The murder rate is down and continues to drop and the traditional analysis of both left and right do not explain it.
But a more unexpected progressive policy on environmental laws may just be why.
Less lead (and not for the reasons you'd think...i.e. bullets) less violence.
[UPDATE: Actually as noted in comments a little elementary oversight on my part would have revealed while this was at Digby's blog it was actually written by David Atkins]