完美诡异的密室谜案

Private Bainbridge had just come off guard duty. He'd stood there for hours, plenty of people watching, nothing apparently wrong. He came off duty and within minutes was nearly dead from a wound in his stomach, but there was no weapon.

Where did it go? Ladies and gentlemen, I invite you to consider this a murderer who can walk through walls, a weapon that can vanish. But in all of this, there is only one element which can be said to be truly remarkable.

Would anyone like to make a guess? Come on, come on, there is actually an element of Q&A to all of this.

Scotland Yard, have you got a theory? Yeah, you, you're a detective, broadly speaking. Got a theory?

Er, um, if the, er. . . If the. . . If the. . . If the blade was propelled through the, erm. . . grating in the air vent, maybe a ballista or a catapult, um. . . Somebody tiny could crawl in there.

So, yeah, we're looking for a dwarf. Brilliant. -Really? -No.

Next? - He stabbed himself. Hello, who was that? Tom?

Got a theory? Attempted suicide, with a blade made of compacted blood and bone.

Broke after piercing his abdomen, like a meat. . . dagger. A meat dagger? - Yes.

Sit down. - No. There was one feature, and only one feature, of interest in the whole of this baffling case,