A famous violinist was found dead in his dressing room just before a major concert. His Stradivarius violin was missing. Three stagehands had access. Tom said he was tuning the piano on stage. Mark said he was sweeping the backstage hallway. Paul said he was boiling water for tea in the dressing room. Detective Hayes arrested one of them immediately. Who was it?

Detective Grant arrived at a cabin where a man sat frozen to death by the fireplace. A full box of matches sat on the mantelpiece, and a log was burning brightly in the grate. There were no doors or windows open. Grant shook his head and said the man froze because he refused to use the matches. Why would a man freeze with a fire and matches right in front of him?

An elderly aristocrat was found dead in his armchair. A glass of poisoned wine sat on the table beside him. His nephew claimed he poured the wine for his uncle right before leaving the room. The butler claimed he never entered the study. The maid claimed she dusted the room at noon. Detective Vance noted that the glass had condensation on the outside, and the room was kept at a freezing 40 degrees Fahrenheit. Vance arrested the nephew. Why?

A jewel thief left a mocking note at the scene of the crime written entirely in capital letters using a red marker. Three suspects were brought in: Mark, who had ink stains on his fingers; Nina, who wore red lipstick; and Leo, who had a red marker in his pocket. Detective Vance cleared Mark and Nina, arresting Leo. What made Leo the obvious culprit beyond just having the marker?

An emerald ring vanished from a high-security vault. Three suspects had access that morning: the cleaner, the technician, and the accountant. Each of them had wet shoes because of a sudden thunderstorm outside. The cleaner said she was mopping the lobby. The technician said he was fixing the server room floor. The accountant said he was working at his dry desk. Detective Fox arrested the accountant. Why?

A rare painting was stolen from a gallery on New Year's Eve. The night watchman swore he never left the front lobby, and the security cameras showed no one entering or leaving through the doors or windows. Detective Ray noticed the snow outside was completely undisturbed except for a straight line of footprints coming *out* of the building, but none going in. How did the thief pull this off?

A renowned diamond cutter was found bound to a chair in his workshop. The safe was open, and the diamonds were gone. The victim whispered with his last breath that the robber wore heavy winter gloves and a woolen ski mask despite it being July. The detective arrested the victim's business partner within minutes. What gave the partner away?