The mystery of the missing tooth

“Check your students' mouths. Try to see if they are missing a tooth. Make sure you are subtle. ”

A trail of blood in the corridors had led to a lone tooth. On this afternoon, we are not just teachers but amateur detectives. It is rather hard to be subtle about looking inside someone's mouth. I did my best and thought I might have found the tooth's owner when I found a streak of red across a desk. It turned out to be lipstick. The toothless child was never found.