@freemo Somewhere I read recently that this number is much lower than it was decades ago. That was attributed to widespread surveillance and genetic evidence that makes them easier to catch.
@mike805 It makes sense that this number is smaller than it probably was in the past. The number i gave is the modern day estimate.
@freemo OTOH rage killers, the sort who have no plan afterward, seem a lot more common today. Is that media amplification, or SSRI drugs, who knows?
@mike805 I suspect this is a similar effect. In the past evidence meant a lot more simply meant undetected.