I Witness is an action film starring Jeff Daniels

Jeff Daniels

Jeffrey Warren "Jeff" Daniels is an American actor, musician and playwright. He founded a non-profit theatre company, the Purple Rose Theatre Company, in his home state of Michigan...

 and James Spader

James Spader

James Todd Spader is an American actor best known for his eccentric roles in movies such as Pretty in Pink, Less Than Zero, Sex, Lies, and Videotape, Crash, Stargate, and Secretary...

. It was released in the United States on February 1, 2003.

Plot

Human rights activist James Rhodes (Daniels) arrives in Tijuana

Tijuana

Tijuana is the largest city on the Baja California Peninsula and center of the Tijuana metropolitan area, part of the international San Diego–Tijuana metropolitan area. An industrial and financial center of Mexico, Tijuana exerts a strong influence on economics, education, culture, art, and politics...

 to help oversee local union elections. While there, he becomes embroiled in a mass murder

Mass murder

Mass murder is the act of murdering a large number of people , typically at the same time or over a relatively short period of time. According to the FBI, mass murder is defined as four or more murders occurring during a particular event with no cooling-off period between the murders...

 at what appears to be a drug runners' tunnel on the Tijuana/San Diego border. He teams up with a local police officer and a diplomat and discovers links to a corrupt corporation.