Despite being 4,590 miles away across the Atlantic, the conscientious American immediately telephoned Merseyside police to report the crime.
Thanks to his diligence, officers were waiting for the crooks and nabbed them as they tried to escape in a getaway car.
Today, Insp Damian Walsh of Merseyside police told the ECHO: "We were amazed when we were informed the person who reported the offence lived in the USA.
"But it showed how vital our camera system is to reduce and prevent offences."