One man's quest to explain his brother's mysterious jail cell death 19 years ago has rekindled long-dormant questions about whether others were involved in the 1995 Oklahoma City bombing.

What some consider a far-fetched conspiracy theory will be at the forefront during a trial set to begin on Monday in Salt Lake City. The Freedom of Information Act lawsuit was brought by a Salt Lake City attorney, Jesse Trentadue, against the FBI. He says the agency will not release security camera videos that show that a second person was with Timothy McVeigh when he parked a truck outside the Oklahoma City federal building and detonated a bomb, killing 168 people. The government claims McVeigh was alone.