Initially we saw that he was experiencing killing anxiety,

一开始我们认为他患有杀戮焦虑症
which led him to clean up the bodies postmortem out of remorse.

所以他会清理尸体表现忏悔
Now his remorse has subsided,

现在忏悔感削弱
and he seems to be experiencing blood lust.

他开始产生嗜血欲
Blood lust means the killer's aroused by the sight of blood.

嗜血欲是说杀人者看到血就会被唤起欲望
Upon seeing it, his body releases adrenaline and dopamine,

见血后身体释放肾上腺素和多巴胺
which is causing the violence to escalate.

引发暴力行为升级
The urge to become violent

想要施加暴力的冲动
is so overwhelming that he's pulverizing his victims

一发不可收于是他反复对被害人施虐
to a point way beyond what's needed to kill them.

绝不仅仅是杀死他们
The force with which he's doing this makes us

他在杀戮中表现出来的力量使我们推测
think he's in shape.

他很健壮