If they felt responsible for his accident,

如果他们为他遭遇的意外感到内疚
They might have rationalized

他们会觉得为他做什么
doing anything to make him happy.

都是应该的
Well, we doubt murder is something they planned on.

我们怀疑这是有计划的谋杀
It's more like a lethal side effect of their son's condition.

这应该是他们儿子身体状况的副作用
If there was orbital cortex damage from the accident,

如果他在意外中伤到额叶皮层
it would help explain why killing is his release.

就能解释为什么杀人能让他得到解脱
If the mother has psychopathic tendencies,

如果母亲有精神病倾向
she could have passed it down through the x chromosome.

这病会经由X染色体遗传给儿子
Garcia's looking up accidents now that have the parents at fault.

加西亚正在查由父母造成的意外事件
That list has to be long.

肯定会查到很多起事故
It is. So she's also looking for unsolved cases in the state.

没错所以她也在查全州没结的案子