A mystery man dressed as Batman walked into a police station in northern England last month and handed over a suspect wanted for burglary.
Still photographs released by the West Yorkshire Police on Monday showed a portly figure wearing an ill-fitting costume including gloves, cape and mask, bringing a 27-year-old man to a police station in Bradford.
The suspect was arrested and charged with handling stolen goods and fraud-related offences, said the force. But the costumed crime-fighter disappeared into the night without leaving his name.
A police spokeswoman said his identity remains unknown.