Translation guide
A person who does something wrong, illegal, or immoral. Japanese has several words depending on the type of wrongdoing, context, and formality.
A person who commits a wrong or offense, often in a legal or moral sense.
A general term for a bad person or wrongdoer. Can be used in both serious and casual contexts.
He is not a wrongdoer.
Specifically a criminal, someone who has committed a crime. More formal and legal than 悪人.
The wrongdoer was arrested.
Perpetrator, especially in the context of causing harm to a victim. Often used in legal or news reports.
The wrongdoer has not been found yet.
A person who does something morally wrong, often with religious or ethical connotations.
A person who breaks rules, laws, or regulations.
悪人 is a general 'bad person', not necessarily a criminal. 犯罪者 specifically means someone who committed a crime. 加害者 is used when there is a clear victim, like in assault or accidents.
Directly translating 'wrongdoer' as 悪いことをする人 is understandable but unnatural. Use the specific terms above depending on context.
あの悪者を捕まえろ！
Catch that wrongdoer!
犯人はまだ逃走中だ。
The wrongdoer is still at large.