The films Saw IV (2007), Saw V (2008), and Saw VI (2009) featured three agents (Peter Strahm, Lindsey Perez, and Dan Erickson), all of them falling victim to the Jigsaw Killer.
Untraceable (2008) stars Diane Lane as an FBI Cyber Crimes agent who is after a serial killer who hooks his victims up to machines set up to where the speed in which his victims die, corresponds to the number of views the live internet stream of the victims receives.