In order to study marine plankton, Lamb, a famous biologist in London, England, stayed in a hut on a cliff near the Bay of Fundy, Canada.
The Bay of Fundy is famous in the world for having the largest difference between high and low tides, with tides of up to 10 meters.
That morning, while Lamb was asleep, the shelf above Lamb's bedside suddenly fell, breaking Lamb's head and bleeding to his death. It wasn't until about 10 a.m. that he was found dead in the cabin, and it was noticed that Lamb's usual dinghy moored under the cliff was gone.
After a thorough investigation by the local **, it was found that the shelf in the deceased's house fell not by accident, but someone took advantage of it**Lamb. According to ** analysis, the most suspicious one is Isidor who works with Lamb, and his ** Lamb's motive is likely to steal Lamb's research results.
However, Isidó had an alibi at the time of the crime, and he left the beach for the town at about 9 p.m. and did not return until noon the next day. Despite this, Sergeant Poirot, who assists in the case, investigates Isidore's method of using the local geography of Lamb.
So what is the method of killing people?
Last Detective Mystery Story: The Invisible Murder Weapon Answer.
The murder weapon was a shard of glass. **After cutting the financial manager's throat, wipe off the blood stains and put the glass shards into the glass fish tank in the break room, so that the transparent glass is not easily detected in the water.