Harry Cordaiy, an 11-year-old Australian boy, was tired of thieves stealing his and other students' lunch money and bus tickets from classrooms. The school administrators weren't doing anything about it, so he rigged up a mousetrap coated with green food coloring, attached a $5 bill to it, stashed it in his backpack, and waited.
He had squirted the device's main bar and metal fittings with green food colouring, cutting a small hole in the note and securing it on the bait hook with sticky tape, so that the thief would have to wrestle with it, thereby setting off the spring and getting hit with the coloured bar.
To his surprise, the thieves took the bait and – after he spread the word among classmates – a witch-hunt began.
"I thought 'Oh my God, I might catch these guys'," Harry said. "Everybody was running around seeing who had green on their fingers."
One of the offenders was caught green-handed en route to the bathroom in a desperate bid to wash off the evidence. The younger boy confessed his guilt. An accomplice in the same year was also nabbed.
(Via Arbroath)
