> I wasn't allowed to trigger the sound to narrow it down further What does this mean? The police cannot force you to not trigger your own sound. They probab

> I wasn't allowed to trigger the sound to narrow it down further What does this mean? The police cannot force you to not trigger your own sound. They probably just didn't want to bother with the process you suggested of standing next to each door and listening. ...which means you should have just done it yourself before they arrived.