CASE ZERO
Case 356

Who is guilty?

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

Chloe: “None of Chloe, Leo or Esme is guilty.”
Leo: “Neither Leo nor Esme is guilty.”
Esme: “Neither Chloe nor Nina is guilty.”
Kai: “None of Leo, Kai or Nina is guilty.”
Nina: “Neither Leo nor Nina is guilty.”
Random case
Solution: Kai 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.