CASE ZERO
Case 297

Who is guilty?

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

Maya: “None of Maya, Noah or Lena is guilty.”
Noah: “Maya is innocent.”
Lena: “The guilty person is one of Lena, Owen or Iris.”
Owen: “The guilty person is either Owen or Iris.”
Iris: “Maya is guilty.”
Random case
Solution: Iris 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.