S16, E8: When the owner of a big-rig trucking company is shot to death, Detectives Fontana (Dennis Farina) and Green (Jesse L. Martin) learn that the victim was hauling illegal aliens and suspect a member (Daniel Roebuck) 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 (Sam Waterston) is incensed when the witness is physically intimidated as he tries to turn one organization member against the other in court. Annie Parisse, S. Epatha Merkerson and Fred Dalton Thompson also star.