A sailor was found murdered aboard a docked ship. The first mate claimed he was scrubbing the main deck in the pouring rain all afternoon. The detective smiled and arrested the first mate. What gave him away?
You do not scrub a deck in pouring rain
Rain naturally washes a deck; scrubbing during a downpour is illogical and indicates a fabricated alibi.
About this riddle
Detective riddles are tiny mysteries. Look for the detail in the story that does not fit; it is usually the clue that solves the case.
Difficulty: Easy. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.
More detective riddles
A priceless diamond was stolen from a locked glass display case. The guard swore nobody entered or left the room, yet the case is empty, unbroken, and the key is in the guard's pocket. How did the thief get the diamond?
A traveler arrived at a desert motel and was found dead of thirst the next morning. His canteen was full of fresh water. The window was open, and the desert winds were calm. Detective Ray noticed a large pile of feathers scattered across the motel floor. Who or what caused the traveler's death?
Detective Hale questions five witnesses about the order they reached the museum door. Jonas reached the door before Nico. Gwen reached the door before Aria. Dmitri reached the door before Gwen. Aria reached the door before Jonas. Who reached the door second?
A cyber-security expert was found dead in front of his multi-monitor workstation. The screens showed complex code, and his coffee cup was warm. Detective Cruz noticed the optical mouse was unplugged. What did this tell her?
A librarian was found dead at the front desk, a heavy dictionary dropped on her head. The security log showed only three visitors entered that afternoon: Mr. Book, Ms. Page, and Dr. Spine. Each person had a verified alibi involving reading in the stacks. Detective Reed noticed a small bookmark sticking out of the dictionary, placed neatly on page 404. Reed arrested the killer. Who was it?
A cyber-crime investigator caught a hacker who claimed he was asleep during the midnight data breach. The investigator pointed to the suspect's smart-home logs and proved he was active. What did the logs show?