CASE ZERO
Case 346

Who is guilty?

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

Ava: “Ava is innocent.”
Eli: “The guilty person is one of Ava, Eli or Nora.”
Nora: “Zoe is guilty.”
Miles: “The guilty person is either Nora or Zoe.”
Zoe: “Neither Eli nor Miles is guilty.”
Random case
Solution: Nora 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.