Accuser (noun)

1. A person who makes an accusation or charges someone with a crime or offense.
2. A person who brings a charge against another person in a court of law.

Origin:

From the latin word "accusare" meaning "to accuse".

Examples:

1. The accuser presented evidence to support their claim that the defendant had committed fraud.
2. The accuser's testimony was crucial in convincing the jury to find the defendant guilty.
3. The accused had the right to confront their accuser in court.
4. The accuser's credibility was called into question by the defense lawyer.
5. The accuser's motives were questioned by the judge.