Murderers have been consistently observed from the time of Cain and Abel too. They have been an observed and recorded fact throughout historical time and virually all human societies.
Therefore, using your definition of "natural", murderers are "natural". Should be create special protections for them? Dont' they have a right to "privacy".
Jeffery Dahlmer was railroaded! A victim of the vast right wing conspiracy to discriminate against murderous canibals! The laws that Dahlmer was convicted on, should be overturned because they only serve to "stigmatize" murderers! (Rant off!)
I didn't intend that, I meant virtually, but virually does fit.