A clever way to get around

Exploration Stage: Traveling Circus
From: Mr. Black
Description: Shh, be quiet. We're just watching an acrobat perform. Judging from their dexterity and softness, they must be good at slipping their bodies into tight spaces. They might even have been able to break in through the chimney of a cabaret. Look for the special safety belts they use. Make sure it's free of chimney soot.
Completed: You found the safety belt. It's a perfect job. But there doesn't appear to be any soot on the chimney. No, it's possible that the soot was removed to cover up any sign of intrusion. It's too early to rule out jugglers as suspects. All right, let's check their alibis.