At first glance, the convenience store recording seemed completely routine.
A customer entered shortly after 2:13 a.m., placed a bottle of water on the counter, paid in cash, and left less than a minute later. The cashier later described it as an ordinary overnight transaction.
Months afterward, while reviewing archived footage for an unrelated training exercise, an analyst noticed something unusual—not in the main image, but in the convex security mirror mounted near the ceiling.
The mirror appeared to show another person standing directly behind the customer.
The problem was simple: the main camera angle clearly showed that space was empty.
Investigators recreated the camera positions using the same layout and lighting. They tested whether the mirror could have reflected someone outside the frame, or whether a visual illusion caused by the curved surface might explain the image.
The experiments produced several interesting possibilities, but none perfectly matched the original frame.
Some believed the shape in the mirror was simply a distorted reflection of a shelf display. Others argued it resembled the outline of a person wearing a hooded jacket.
The image became an excellent example of how our brains interpret incomplete visual information. Once someone points out a possible “person,” many viewers can no longer see anything else.
That’s why this fictional case file is used as a puzzle rather than a solved mystery.
So now it’s your turn:
What do you think the mirror is really showing?
