noun, noun which may take the genitive case particle 'no', noun or participle which takes 'suru', intransitive verb
voluntary appearance for questioning
Legal term for appearing at a police station or investigative agency of one's own accord, without being arrested or formally summoned.
容疑者は任意出頭に応じた。
The suspect complied with the request for voluntary appearance.
警察は彼に任意出
The police asked him to come in voluntarily for questioning.