Murder's weapon on the table

(Photo: Murder’s weapon on the table, by Maarten Van Damme. CC Licensed)

There’s been a murder! It is 1934 in London, and at an upper class party in a mansion, the owner has been found murdered. Knowing that the killer might escape in the commotion, a detective, who was a guest in the party, quickly organizes everybody, closes all the exits, and, after making sure everyone on the guest list is accounted for, begins investigating who did it. After some thorough investigation and a lot of interrogations, all the facts point only to one person. But it can’t be… The evidence is so convincing that the detective even starts to believe it. Somehow, someway… he himself is actually the killer!