Forensic analysis indicated the arm had been amputated with a serrated blade. It had previously been split along the anterior side, the bones removed and replaced with bones with similar composition to those of Anomalous Item 2181-01. DNA analysis of the surrounding tissue indicated the arm belonged to Dr. Amelia Wygandt; identification of the ring on the fourth finger confirmed this. Inscribed into the dorsal surface of the forearm was a message in Morse code, translated below.
On ██/██/2014, a human right arm, severed 8 cm below the shoulder, was found on the hallway floor outside SCP-2181's containment cell and subsequently classified Anomalous Item 2181-02. Surveillance footage gives no indication of how AI 2181-02 arrived at Site-145. Surreptitious questioning revealed no knowledge of the item by SCP-2181.