Detective Miller walked into a locked-room crime scene. The victim was sitting in a swivel chair facing a blank wall, holding a telephone receiver to his ear. The phone line was completely cut outside the house. Miller smiled and said, 'He knew he was in danger before the line went dead.' How did Miller know?
A dead dial tone sounds different.
If the phone line was cut while he was holding it to his ear, he would immediately hear dead silence or a weird tone, yet he was still holding it expectantly, meaning he called someone or realized something else. Wait, actually: if the line was cut *before* he picked it up, he'd hear nothing. But the riddle specifies he was holding it when Miller arrived. The clue is that holding a dead phone without reacting implies he was already dead or tricked. Alternatively: The receiver was dead, so he couldn't have been talking to anyone.
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: Medium. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.
More detective riddles
Four friends passed notes. Ana passed to Ben, Ben passed to Cal, Cal passed to Dee. Who got the note last?
A woman was found dead at the bottom of a skyscraper stairwell. Her pockets held a set of keys and a crumpled grocery list. The detective rode the elevator to the 50th floor, stepped out, walked to the stairwell, and arrested the building's night watchman. Why did the detective suspect the watchman immediately?
A woman walked into a police station claiming her expensive necklace was stolen from her hotel safe while she was asleep. She gave a detailed description of the suspect. Detective Cole looked at her hotel bill and immediately arrested her for filing a false report. What did the bill show?
A priceless manuscript was stolen from a locked vault. The thief left behind a single clue: a handwritten note that read, 'I am the first, the middle, and the last.' Detective Thorne checked the museum staff roster and immediately arrested the night archivist named Adam. Why?
A famous explorer was found poisoned in his tent in the middle of a hot desert. The cap of his water canteen was unscrewed and lying on the sand. Three companions brought him water at different times. Companion A brought water at noon, Companion B at 2:00 PM, and Companion C at 4:00 PM. The coroner stated the poison took effect instantly upon drinking. Detective Holt arrested Companion A. Why?
Inspector Cole walked into a freezing cabin and found a man dead on the floor from a gunshot wound to the chest. There was no gun anywhere in the room. The only tracks in the fresh snow outside belonged to the victim, leading straight to the cabin door and stopping. The windows were frozen shut from the inside. How did the killer commit the crime without leaving tracks or a weapon?