For me, this is the question:
Can adults blame childhood experience for criminal behaviour?
According to the Menendez murderers, well after the murders and the arrests, they claim that they experienced childhood abuse, and the murders were nothing more than putting their parents out of their misery before they killed their children (the Menendez brothers).
Fifteen shotgun blasts, with the last bullet killing them in each case. Their father was shot 4 times before the fatal bullet was shot point blank at the back of his head. HIs mother was shot 9 times before the fatal bullet entered her cheek.
Was it anger, was it a reaction to an imagined event, were they putting their mother out of her misery, or did they just want the money?