John André’s Stocking

Origin
John André was a British Army officer hanged as a spy by the Continental Army during the American Revolutionary War for assisting Benedict Arnold's attempted surrender of the fort at West Point, New York to the British. The capture of West Point would have separated the rebellious New England colonies from the others. Agreeing to a price of £20,000, Arnold gave André six documents in his handwriting showing the vulnerable points of the fort. André hid the papers in his stockings and set out by horseback until he mistook several militiamen for Loyalists, revealing his identity to them. A search led to the discovery of the papers, which were brought to General Washington. He secured the fort, although Arnold had fled earlier, and tried André for espionage.

Effects
The stocking will create incriminating evidence of any mischievous act a person does or plans. They will be found with missing evidence from the crime scene and correspondence detailing their intentions. All their accomplices will run away or confess to their misdeed and the person will sometimes accidently speak out parts of their plan. After confession/conviction, the affected person will suffer some form of corporal punishment; no physical instrument will be found, only the damage.