CASE ZERO
Case 342

Who is guilty?

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

Amira: “None of Tess, Hugo or Mae is guilty.”
Jack: “The guilty person is either Amira or Hugo.”
Tess: “The guilty person is one of Amira, Jack or Hugo.”
Hugo: “Neither Tess nor Mae is guilty.”
Mae: “None of Amira, Tess or Hugo is guilty.”
Random case
Solution: Jack 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.