捜そう査さ線せん

noun

criminal investigation; investigative net

Refers to the scope or network of a criminal investigation, often used in police or detective contexts. Can imply the investigative reach or the line of inquiry.

• 警けい察さつは広こう範はん囲いに捜そう査さ線せんを張はった。

  The police cast a wide investigative net.

• 新あらたな証しょう拠こが見みつかり、捜そう査さ線せんが拡かく大だいされた。

  New evidence was found and the investigation was expanded.