Detective Finch walked into a freezing cabin where a man sat dead at a wooden table. On the table sat an unlit kerosene lamp, a box of matches with one match missing, and a thick woolen winter coat draped over the empty chair next to him. The window was frozen shut from the inside. Finch noted the man froze to death, but suspected foul play. Why?

A renowned explorer was found dead inside his locked study. A suicide note lay on his desk, written with a fountain pen. Inspector Dale picked up the note, held it up to the desk lamp, and immediately declared it a forgery. The note stated the explorer was depressed about losing his eyesight in his left eye. What proved Dale right?

A priceless golden amulet was stolen from an exhibition hall during a power outage that lasted exactly ten minutes. The backup generator kicked in instantly, bathing the room in red emergency light. Three suspects were detained inside the pitch-black vault corridor before the lights returned: Arthur, who was holding a white handkerchief; Brenda, who had dark charcoal smudges on her fingertips; and Charles, who was wearing polarized sunglasses. Detective Vance arrested the thief without hesitation. Who was it?

Detective Miller walked into the galley kitchen where a chef lay unconscious. The gas stove was hissing, filling the room with natural gas. On the counter sat a bowl of unwhipped cream, a whisk, and a burning candle. Miller immediately turned off the gas and called an ambulance. What saved the room from exploding before Miller arrived?

A priceless golden goblet was stolen from a pedestal in the center of a heavily guarded room. The room had a circular marble floor surrounded by freshly fallen white snow outside every window and door, with zero footprints leading in or out. The ceiling had no vents. How did the thief steal the goblet?

The jeweler claimed his safe was robbed while he slept upstairs. The heavy steel door was swung wide open, and all the diamond rings were gone. Detective Briggs inspected the floor and found a thick layer of undisturbed dust right across the doorway threshold where the heavy door would have swung. Briggs arrested the jeweler for insurance fraud. Why?

An antique pocket watch was reported missing from a locked display case at a museum gala. The night watchman stated he never left his desk and watched the main entrance the entire evening. Security footage showed no one entering or leaving the room through the doors. Detective Grant reviewed the tapes and noticed the watchman was wearing thick winter gloves despite it being a warm July night. Why did this solve the case?