来自《犯罪心理第9季第4集第4集》

There's something to that.

此外还有
The same genes that develop the iris

虹膜的发育还有额前叶的形成
also shape the frontal lobe,

都由同一组基因控制
which influences personality.

并且额前叶与性格相关
Why is this part of his ritual now but it wasn't in Berlin?

这为什么成了作案手法在柏林却不是呢
Well, that's unclear, but his first kill in Berlin

还不好说不过他初次杀人是在柏林
means he has a significant connection there.

他跟那里肯定大有关系
He's likely visiting the U.S. and he feels out of place.

他可能是暂时访美觉得不适应
And that may be how he connected with his victims.

可能因此认识了被害人
He's definitely had medical training.

他肯定进行过医疗培训
His German victim was a student,

德国那个被害人是个学生
and the unsub may also be in those circles.

嫌犯可能也是那个圈子的