Londoners were outraged when the Bow Street Runners, the London police force, failed to capture the man. Philanthropist John Julius Angerstein promised a reward of £100 for capture of the perpetrator. Armed vigilantes began to patrol in the city. Fashionable ladies began to wear copper pans over their petticoats. There were false accusations and attacks against suspicious people. Local pickpockets and other criminals used the panic to their advantage; they picked someone's valuables, pointed at him, shouted "Monster!", and escaped during the resulting mayhem.