Murderer (noun)

A person who kills another person illegally and with premeditation.

Origin:

Late middle english: from old french murdrer, based on latin mors, mort- "death".

Examples:

1. The murderer was sentenced to life in prison.
2. The police are searching for the murderer of the young woman.
3. The murderer showed no remorse for his actions.
4. The murderer was finally caught after a long manhunt.
5. The murderer's motive for the crime was never determined.