CASE ZERO
Case 068

Who is guilty?

Exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.

Chloe: “The guilty person is one of Esme, Kai or Nina.”
Leo: “None of Chloe, Leo or Esme is guilty.”
Esme: “Leo is innocent.”
Kai: “The guilty person is either Kai or Nina.”
Nina: “The guilty person is either Chloe or Kai.”
Random case
Solution: Nina is guilty. Testing each possible culprit leaves this as the only assignment where the culprit's statement is false and all four innocent statements are true.