In many cases when we cover involving human trafficking, it involves a child or a teenager. However in the kidnapping case of Sherri Papini, investigators say sex trafficking could be the possible motive even if they're not yet sure.

It was early Thanksgiving morning when Papini was found off a rural road near I-5 in Yolo County.

According to Meredith Curry, the director and founder of Restoration Railroad, an organization that helps survivors of human trafficking, I-5 is a huge corridor for human trafficking.

Curry knows some of the signs of the horrendous industry including branding. The Shasta County Sheriff said Papini had some kind of brand on her body when she was found.

"It's literally a tattoo that they put somewhere on the victim's body," Papini said. "If you're dealing with gang members then often the tattoo will be a street moniker or some kind of symbol."

Curry said some victims of human trafficking are older and can happen to someone of any age. The most common element of any trafficking victim she said is vulnerability.

"Social media our culture now has normalized posting private personal information about ourselves and online that makes you an easier target," Curry said.

In addition to social media, she recommends people to change up daily routines.

According to Restoration Railroad, human trafficking is the world's fastest growing criminal industry and is estimated to be worth $32 billion dollars a year.

Since 2007, the National Human Trafficking Hotline has received reports of 14,588 sex trafficking cases inside the United States.