forensic professional

Exploration Stage: Collector's House
From: Detective
Description: The safe in which the message is stored is naturally locked, but for a forensic scientist like me, this is not a problem. All I need is a device to pick up the sound of the key clicking. Can you find it for me?
Completed: Okay, I'm going to show you now how to crack a safe. Attach this device to the door and turn the dial until you hear a click. Then turn the dial in the opposite direction and listen for the same sound. Repeat this several times and the door will open.