杀婴者

例句：

1. 1. The police are investigating the case of a serial killer who killed several children.
   警方正在调查一名连环杀手的案件，这名连环杀手已经杀害了几名儿童。
2. 2. The child's mother was arrested for the murder of her infant son.
   孩子的妈妈因谋杀她婴儿儿子而被逮捕。
3. 3. This is a chilling reminder that we must always be vigilant against such heinous crimes.
   这是一个令人不寒而栗的提醒，我们必须始终警惕这类可怕的罪行。