"Untraceable" is great suspense movie by Gregory Hoblit. His Primal Fear, Fallen, Frequency were excellent.

The plot is cat-and-mouse chase by serial killer vs. FBI agents. FBI cyber crime specialist Jennifer Marsh, she attempts to track down a serial killer who displays his murders on the Internet.

In "Untraceable", you'll see some horrible scenes like SAW series. I warn you. If you dislike sadistic violence scenes, I don't recommend it.

Diane Lane, she was one of my favorite actresses since The Outsiders. And, even now.