CASE ZERO
Case 132

Who is guilty?

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

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