killers
A killer is a person who has killed someone, or who intends to kill someone.
The police are searching for his killers.
警方正在缉拿杀死他的凶手。
You can refer to something that causes death or is likely to cause death as a killer.
Heart disease is the biggest killer of men in developed countries.
对于发达国家的人来说,心脏病是最致命的杀手。