"I could have been killed, Captain Black!" cried Sam Dancer, greatly upset. "My partner left early tonight, and I was closing the disco all alone. Suddenly, this guy came in with a gun! He took our money and then he too a shot at me! Luckily, the bullet just scraped past my arm." Sam showed Captain Black the bandaged flesh wound.
"This is where the robbery took place?" the Captain asked.
"Yes, Nothing's been touched. I've seen enough detective movies to know that you'd look for clues."
Black stood in the middle of the mirrored walls of the dance floor. Each smooth glass surface perfectly reflected the scene of the crime. Then Black turned to Sam.
"You left one clue too many, Sam. Or, rather, you didn't leave it. You're lying."
~Why doesn't the Captain believe Sam's story?~