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You can stream Untraceable (2008) on Sony Pictures Core Amazon Channel with a subscription.

Special Agent Jennifer Marsh works in an elite division of the FBI dedicated to fighting cybercrime. She thinks she has seen it all, until a particularly sadistic criminal arises on the Internet. This tech-savvy killer posts live feeds of his crimes on his website; the more hits the site gets, the faster the victim dies. Marsh and her team must find the elusive killer before time runs out.

A sadistic killer turns internet traffic into a countdown clock for human lives. If the world stops clicking, the victim stops breathing.

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