This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

DENVER — Law enforcement officers say they see a spike in sex trafficking in metro Denver during big conventions and events like the National Western Stock Show, which is currently in town.

An undercover agent said most sex trafficking victims are trapped by fear and a powerful psychological coercion.

Julie Hayden shows in her video report what authorities are doing to teach others what to watch for.