If he did murder his family, I think it is fair to say that it could certainly be a factor although I can't see it being the sole reason. However, any personality issues he may suffer could be influenced by a feeling of rejection, not just once (adoption) but twice (boarding school at only 8 years of age).
We can only assume Caroline and I think its unfair to assume that those two points you have made could be associated with this crime or any other crime, but I fully understand why a profile on ones life experiences may be regarded as being an influence towards crime in later years.
However, to say this might imply that everyone who has had ups and downs during their life are not likely to commit any crimes at all. Its a difficult to grasp with certainty that those two points you have made contributed to him killing his family.
Criminologists look into the backgrounds of murderers to try to establish the reason behind their motives for killing. Most backgrounds that are discovered are common in the majority of the people that live in this world. They are not killers. Its my belief that it more of a chemical imbalance, but I wont go into that. Fascinating all the same.

I know you are interested in this sort stuff...Its great to discuss it and see what others think about it.
