A poisoned letter arrived at police headquarters. The envelope was addressed in neat cursive, but the return address was written in block letters. Inside was a blank sheet of paper coated in a fast-acting neurotoxin. The lab technician handled it safely with tongs. What clue did the handwriting provide?
The sender tried to disguise their handwriting
Using cursive for the address and block letters for the return address indicates an intentional attempt to disguise two different writing styles from the same hand.
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
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?
Three kids race to build the tallest snowball tower. Mia finished before Zoe. Max finished before Mia. Who finished last?
Detective Vance found the victim slumped over a desk with a punctured chest wound and a puddle of water nearby. The room had a locked door and a completely frozen window pane. There were no weapons in the room, only a pool of water that had already soaked into the rug. How did the killer pull this off?
Detective Holmes was given a cold case file regarding a robbery at a secluded mansion. The original report stated the thief cut the telephone lines outside, broke a window, and stole silver candlesticks. Holmes read the report and immediately realized the original police department had botched the case. What modern impossibility or logical flaw existed in the report?
A priceless golden statue vanished from a pedestal inside a heavily guarded vault. The vault door had a combination lock that had not been turned, and the laser grid was completely uninterrupted. The ceiling vent was too small for a human. How did the thief get the statue out?
A wealthy investor was found dead in his home office, shot through the heart. The gun was clutched tightly in his right hand. A heavy crystal ashtray was shattered on the floor nearby. The detective noticed the burn mark on the victim's right sleeve, but the unlit cigar was clutched in his left hand, and his index finger on his right hand had no gunpowder residue. Who pulled the trigger?