Untraceable (2008)

In a suburban Portland home, FBI Special Agent Jennifer Marsh juggles her cybercrime division job and single parenthood. When a sadistic killer launches KillWithMe.com, livestreaming torturous deaths, Jennifer races to stop the escalating violence. With her partner Griffin kidnapped and a personal vendetta revealed, Jennifer confronts the killer in a deadly cat-and-mouse game, fighting to save lives and her own family.