Deceptive sensors

Exploration Stage: Hall of Departure
From: Kira Woodville
Description: I am very interested in the culprit who robbed the Luxmore house. How did the culprits get around the best alarm system in town? The sensors were installed by the Sheriff's Department, so we know where they are. Can you find them?
Completed: Yes, it is. The sensor of the alarm is disguised as a mechanical falcon and is not even broken. The perpetrator somehow circumvented this contraption... although Director Black has not told me that the perpetrator is a ghost...