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ST. LOUIS, MO (KTVI)-- You can help stop sex trafficking just by taking pictures of your next hotel room.
A group called "The Exchange Initiative" believes your pictures will help expose the offices of pimps.
Fox Files reporter Chris Hayes first revealed this investigative tool a year and a half ago and explains how you can now get involved.
Almost every online sale of a human body shows a picture taken at a hotel or motel. Sometimes you can even see St. Louis landmarks in the background, like the Edward Jones Dome and the old St. Louis Courthouse.
Kim Ritter started compiled the images. She first told us about it in November of 2012.
Her research has pressured hotels to train employees to look for trafficking and helped police narrow in on pimps. So now she`s partnering with two other women in a community action group called The Exchange Initiative.
They want to build a web site of hotel pictures, taken by regular people that could be used by police.
Author Nita Belles, who combats sex trafficking across the country, attended last week`s St. Louis Sex Trafficking Conference and talked about how attention can be a chilling effect.
Exposure may also help rescue someone. Some of these cases involve young teens.