Movie with FBI watching a maffia restaurant from a house

I saw a movie a long time ago about FBI agents watching a restaurant owned by a maffia boss and used for mob meetings. They watched from the house across the street. I don’t know who played the main character, but I believe his role was to infiltrate in the mob or something like that. There is a scene where he meets someone else and that person has a sort of room-sized cage where their computer sits. Their location is found by the bad people and they escape. I also remember something about a government official being killed in a car accident, but a nature photographer’s camera filmed it was a murder. Hitman try to hunt him down.