In May 1725 a London mob pelted a man with rocks and mud as a cart carried him from Newgate Prison to the Tyburn gallows. The condemned was Jonathan Wild, the self-styled Thief-Taker General, a celebrated crime fighter who had sent dozens of criminals to the noose. The public had just learned that their hero was also the city’s most ruthless crime boss. This episode reconstructs how a failed buckle maker from Wolverhampton learned the justice system from inside a debtor’s prison and then turned it into a business.

London had no professional police, only unpaid constables, elderly watchmen, and bounties for private citizens who secured convictions. Wild exploited every gap. He ran what looked like a lost property office, brokering the return of stolen goods for a fee while never touching them himself, which kept him clear of the law against compounding a felony. Then he began ordering the robberies, and when his own thieves stepped out of line he handed them to the courts, collected the reward, and watched them hang.

• Wild learned the trade as assistant to Charles Hitchen, the Under City Marshal, who forced young thieves to surrender loot and then charged victims to get it back.
• He advertised lost items in newspapers such as the Daily Courant, posing as a concerned citizen while cataloging thefts his own gang had carried out.
• The government paid rewards of up to 40 pounds for convicting highwaymen and burglars, so Wild profited from disciplining his own workforce.
• A 1718 pamphlet war ended with Wild exposing Hitchen’s private life and Hitchen in the pillory, but the publicity brought scrutiny Wild could not survive.
• Crime spiked after his execution, and the chaos helped lead magistrates Henry and John Fielding to found the salaried Bow Street Runners in the 1750s.