noun
Refers to a person who has committed murder. Slightly formal or legalistic compared to 人殺し.
警察は殺人者を逮捕した。
The police arrested the murderer.
彼は冷酷な殺人者として知られている。
He is known as a cold-blooded killer.
Emphasizes the criminal aspect; often used in legal or news contexts.
Compound of 殺人 (satsujin, 'murder') + 者 (sha, 'person').