I know murder is rare and killing one's parents even rarer. The parents must mean nothing to their child for it to pursue this course,with no redeeming feature or family anecdote to recall. I'm thinking now of David Bain,who like Jeremy volunteered no information about family life during Police interrogation. It's as if they have divorced themselves of all feeling(whether by stimulants with Jeremy or trance with David) and see the slaughter as a means to an end,under which their current perceived predicament is assuaged.
How anybody can continue to live with those deaths on their conscience I cannot begin to fathom,let alone string people like Trudi Benjamin,Poppy Meze and others along.