noun
mobile investigation unit (police); MIU
A specialized police unit that conducts rapid initial investigations at crime scenes, often using vehicles.
事件が発生すると、すぐに機動捜査隊が現場に駆けつけた。
When the incident occurred, the mobile investigation unit rushed to the scene immediately.
Compound of 機動 (mobile, maneuver) + 捜査 (investigation) + 隊 (unit, squad).