Then why go after surrogates?

那他为何还去找替代品
I don't think we're dealing with

我觉得我们面对的
a typical homeless person.

不是普通的无家可归者
He's good with chemicals, owns a car.

他很熟悉化学品又有车
I think the only mistake in our profile

我觉得我们的侧写里
was assuming there was something wrong with his physical composition,

唯一的错误是假定他有生理缺陷
reducing him to some sort of stereotype.

把对他的判定局限了起来
You think it's only his mental state?

你认为他只是精神有障碍
I think this guy might be smart enough to use his disability

这个人可能非常聪明地利用了他的缺陷
to his advantage so he comes across as harmless.

让自己看起来完全无害
Then when he's alone and the victim rejects him,

而他私下里遭到被害人的拒绝后
he goes off.

就爆发了