Welcome to the Meridian Art Gallery, detective. At 8:30 this morning, the 16th-century Iznik plate — the star of today's auction — was found replaced in the vault with an expertly crafted replica. The original is missing. Insured value: 12 million TRY. The gallery closed to visitors at 8:00 PM last night. Only four people were in the building overnight: manager Selin Aydın, restorer Kerem Doğan, security guard Mustafa Yılmaz, and intern Deniz Kaya. Vault records show it was opened at 9:12 PM. Question the suspects, examine the evidence, and prove who made the switch.