just needed someplace to store the loose round so he wouldn't lose it. The chamber was empty and available soooo......
No, no, no. He really didn't do anything wrong.
He was giving the class on gun safety, and the students/interns were paying such close attention..... that they didn't see what the instructor saw. He detected a 'clear and present danger' from the desk. He couldn't tell everyone to "hide under the desk", as IT was the threat.
So, he shot it.