Inspector Lane investigated a counterfeit painting ring operating out of an old barn. Inside, she found a master forger working frantically on a canvas depicting a snowy winter landscape. Canvases, tubes of oil paint, and brushes were everywhere. Lane pointed to a calendar on the wall showing the current date as July 12th and immediately confiscated the unfinished painting as primary evidence. What gave away the forgery operation's timeline?
The oil paint takes months to dry, making a winter painting created in July impossible to pass off as an aged antique.
Oil paintings take a very long time to dry fully. Furthermore, a winter scene painted in mid-summer by a forger trying to pass it off as an old master's work exposes the fresh medium.
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 counterfeiter was operating out of an abandoned warehouse. Police raided the location and found printing presses, ink, and stacks of forged hundred-dollar bills. When questioned, the printer claimed he was only printing educational flashcards for a local school. Why did the detective laugh and cuff him?
An antique dealer was murdered behind his counter. His ledger was open to a page dated November 31st. Detective Cross immediately knew the ledger entry was a forgery written by the killer after the murder. Why?
A valentine was left on the desk. It was signed with a doodle of a cat. Only Sam draws cats. Who sent it?
At the scene of the corporate espionage, a scorched piece of paper lay in the fireplace. Detective Cross used a chemical spray to reveal the hidden message: 'Meet me at midnight.' Yet, Cross immediately arrested the CEO for writing a fake suicide note. Why?
A jewelry store window was smashed from the inside, yet the valuable gems were missing from the display trays. The night watchman claimed a masked man jumped through the glass from the street to grab them. Detective Stone arrested the watchman for insurance fraud. Why?
In a dimly lit study, a wealthy banker was shot. His business partner claimed he was outside smoking a cigar when he heard the shot. Detective Cross picked up the partner's unlit cigar, felt it, and placed him under arrest. What betrayed the partner?

