Case 074
The Disabled Camera
A security camera was deliberately switched off.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Dakota
“Reese and Riley are both innocent.”
Jordan
“Either Kai or Riley is guilty.”
Kai
“Reese is innocent.”
Reese
“Jordan is guilty.”
Riley
“Kai and Reese are both innocent.”
Who is guilty?
Solution: Jordan
If Jordan is guilty, Jordan's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.