Translation of "Killer" in Chinese

Betty is a serial killer.

贝蒂是连环杀手。

Sami was speaking to Layla's killer.

萨米在与莱拉的杀手说话。

We know the identity of Tom's killer.

我們知道了湯姆的殺手的身份。

- Tom had no idea that Mary was a serial killer.
- Tom had no idea Mary was a serial killer.

汤姆不知道玛丽是个连环杀手。

He is a killer, he should be behind bars!

他是個兇手，應該進到牢裡。

What kind of person looks up to a genocidal killer and calls him a hero?

什麼樣的人會將種族滅絕者，稱之為“英雄”？