CASE ZERO
Case 258

Who is guilty?

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

Ava: “The guilty person is one of Ava, Eli or Zoe.”
Eli: “None of Eli, Nora or Miles is guilty.”
Nora: “Neither Nora nor Miles is guilty.”
Miles: “Ava is innocent.”
Zoe: “The guilty person is either Nora or Miles.”
Random case
Solution: Zoe 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.