Untraceable (2008)

One serial killer has become a headache for the FBI as this killer performs the murders in public, for a live Internet audience and yet remains untraceable. This serial killer uses ludicrous ways to kill the victims. One of the victims is stripped naked with his legs encased in concrete. He is surrounded by sun lamps, and a live-streaming image is posted on the website killwithme.com. The viewers are then informed that the number of hits the site gets will accelerate, or slow down, the heat to which the man is exposed. The more people log on, the faster he fries. The killer coerces the thrill-hungry public to participate in an act of public murder. Inevitably, the site is jammed with viewers and everyone who watches is a murderer. It’s a fiendish scheme that an FBI cyber-crime agent, Jennifer Marsh (Diane Lane), and her partner, Griffin Dowd (Colin Hanks), must unravel. A local cop Eric Box (Billy Burke) too joins them to assist them, but the cunning villain has made his website untraceable. Indeed, any attempt to crack it gives the killer the name and location of the investigators, who instantly find themselves on the killing list. While Marsh is trying her best to trace the killer, she is forced to do all she can when she comes to know that the next victim could be her mother Stella Marsh (Mary Beth Hurt) or daughter Annie Haskins (Perla Haney-Jardine). Now begins a deadly chase to trace and catch this serial killer, who was till now, untraceable.