After gangsters were captured, the kebiishi (a police and judicial chief) at the kokuga interrogated the criminals, and zuryo sent to Daijokan a report describing how the criminal investigation was conducted.
凶党を捕縛した後は、国衙の検非違使が尋問にあたり、捜査経緯をまとめた報告書を受領から太政官へ進達した。