Law & Order S16E08 - New York Minute

When the owner of a big-rig trucking company is shot to death, Detectives Fontana and Green learn that the victim was hauling illegal aliens and suspect a member (Daniel Roebuck) of a citizen's border patrol group; but their only witness is an undocumented Hispanic woman (Aixa Rosario Medina) who risks deportation if she testifies. Meanwhile, prosecutor McCoy is incensed when the witness is physically intimidated as he tries to turn one organization member against the other in court.