Is Homeland Security Enforcing Emissions Standards?

The story is so bizarre I have a hard time believing it’s true: A North Carolina couple reports the Department of Homeland Security seized their imported, $60,000 Land Rover because it might not have complied with emissions standards for imported cars, as Steve Ohnesorge reports for WBTV (hat tip to Heritage). According to the report, some sellers of import cars doctor the VIN numbers to make them appear older; emissions standards vary by the car’s age. Is the story true? If it is, why is Homeland Security enforcing emissions standards? Come to think of it, why do we even have emissions standards? Regardless, wasn’t there a more graceful way for the government to handle the alleged problem? Sheesh!