杀人狂

例句：

1. 1. The killer was caughtafter a long manhunt.
   经过长时间的搜捕，凶手被抓获。
2. 2. He's known for his violent tendencies andhas been labeled a "killer."
   他以暴力倾向而闻名，并被贴上了“杀手”的标签。
3. 3. The massmurderer committed the crime in coldblood.
   这个大规模谋杀犯在冷血中犯下了罪行。