noun
important witness; material witness
Legal term for a witness whose testimony is crucial to a case. Used in court proceedings and investigations.
検察は重要参考人として彼を法廷に呼んだ。
The prosecution called him to the stand as a material witness.
noun
prime suspect
Euphemistic or media term for a person strongly suspected of a crime but not yet formally charged. Often used in news reports.
警察は重要参考人として彼の身柄を確保した。
The police detained him as a prime suspect.