找對象先看他/她的家庭 真的很重要。有研究結果顯示，謀殺、暴力 等等與基因有關，他的孩子有可能遺傳他的基因。雖然女主的人間蒸發還沒有法律結論，但本人相信他們那些老同學的直覺。
http://www.telegraph.co.uk/news/science/science-news/11192643/Violence-genes-may-be-responsible-for-one-in-10-serious-crimes.html
Researchers at the Karolinska Institute in Sweden analysed the genetic make-up of 895 criminals from Finland to see if violence was in their DNA.
The criminals who had committed the most serious crimes, such as murder, were found to have variants of two genes; monoamine oxidase A (MAOA) and cadherin 13 (CDH13).
MAOA is linked to dopamine levels in the brain, a chemical which makes people feel happy and fulfilled. CDH13 is linked to impulse control.
