BBB Teams Up with Chris Hansen, Dateline This Sunday

This Sunday, January 30th at 6 PM Central Time, Dateline presents "The Hansen Files."

With the help of the Better Business Bureau, Dateline's hidden cameras take a special look into a nationwide ring of air duct cleaning companies. This brazen scam -- one that has thrived for more than a decade -- cons thousands of consumers out of millions of dollars, and targets one of the most vulnerable segments of the population: the elderly.

Dateline discovers that many air duct cleaning companies across the country are using advertising tricks, such as the infamous "bait and switch," promising a low price for the service, only to raise it once in the door. Using hidden cameras, viewers watch what happens as  volunteers call one of the rogue companies. What you'll see next will surprise you, as these air duct cleaners take the volunteers to the cleaners! But the technician will be in for a surprise when Chris Hansen shows up to expose them.