Sausage Thief is the 71th puzzle from The Curious Village.
Somebody ate the butcher's sausages! Here's what these four boys have to say: A: "B ate the sausages!" B: "D ate them all up!" C: "I didn't eat them,no way!" D: "B's totally lying!" Only one of these rascals is telling the truth and all the others are, needless to say, lying. Can you figure out who ate the sausage?