We can only speculate, but if his victims do represent him,

我们只能推测不过被害人若真能映射凶手
then he's telling us that

那他就是想告诉我们
he feels lobotomized and powerless.

他觉得自己被实施过脑叶切除术虚弱无力
This could mean he was raised in a strict home

可能他家教严格
or one where he didn't have a voice.

或是长在没有话语权的环境中
Do you think he was heavily medicated or institutionalized?

你认为他接受过长期的药物或住院治疗吗
Maybe. A majority of the lobotomy patients

有可能上世纪40年代
in the 1940s were mentally ill

实施过脑叶切除术的病人大多
and resided in state-run institutions.

患有精神疾病住在州立精神病院
The doctors there felt they were providing mercy to the patients,

那里的医生认为他们这是为病人着想
but the use of the camera tells us

不过嫌犯使用了摄像头
that this unsub wants his victims to suffer.

说明他想要折磨被害人