Mentally ill parents can have normal children just like normal parents can have mentally ill children.
Escaping a disturbed family doesn’t prove that mental illness is not biologically based.
True.
According to some articles, The shooter was adopted. So there's no blood relationship between and the parents, just love.
That’s not what I meant. The parents in the Pines family were not mentally ill. The father was a successful medical doctor, the mother was a prominent attorney. They were neglectful, selfish parents. They divorced. The father kept the children and married a prostitute. She was abusive and mentally cruel to the younger son. The older one was already away at boarding school. What she did to the child, compounded by his parents’ indifference, caused the boy - who was brilliant - to go mad. Biology had nothing to do with it.