An art collector was found dead beside a shattered vase. A calendar on the wall had the date 'April 31' circled in red marker. Detective Vance smiled and arrested the victim's business partner for staging a fake break-in. Why?

The red heart is bigger than the pink heart, and the pink heart is bigger than the white heart. Which heart is the biggest?

Detective Cruz entered a freezing cabin where a man sat frozen to death by the fireplace. The firewood was stacked high, matches were nearby, but the hearth was completely clean of ash. Cruz knew the victim didn't just forget to light the fire; someone else stopped him. What was the clue?

A high-stakes poker player was shot dead at a private club table. Four players were at the table. Player A claimed he was dealing the cards. Player B claimed he was shuffling the deck. Player C claimed he was counting his chips. Player D claimed he was cutting the cards. Detective Thorne arrested Player C. Why?

An old sea captain was found murdered in his cabin. His logbook was open to an entry dated October 12, detailing a storm. However, the calendar on the wall showed September 15. Why did the detective suspect the logbook was forged?

Detective Sterling walked into a dark alley where a courier had been robbed. The courier insisted he couldn't see the mugger's face because it was pitch black and the streetlamps were broken. Sterling flicked his cigarette, pointed at the courier's watch, and said, 'You're lying.' What did the watch reveal?

Lord Blackwood was murdered in his study during a fierce thunderstorm. The detective arrived to find the lights off, a candle burned down to a stub on the table, and a bullet hole in the west wall. The butler stated, 'I rushed in the second I heard the shot, tripped in the pitch darkness, and knocked over the bookshelf.' The detective arrested the butler on the spot. Why?