CHICAGO - The FBI says there has been a rise in the number of cases and victims involving 764 members. They are a violent online network the bureau says is targeting teens in Chicago and around the world.

"So these criminals are locking these victims into a cycle of escalating manipulation to conduct and engage in more depraved behavior for their goal of destroying society," said Ryan Maxwell, an assistant special agent in charge with the FBI Chicago Field Office.

In a Fox 32 special report , Dane Placko takes a look at how they operate and how you can protect your kids from becoming their next victim.

We want to warn you—some of the details in this story are graphic.

What we know:

A disturbing online network built on manipulation

"If you or someone you love is on the inter

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