NCIS Season 7 Episode 14

Marine Lance Corporal Roman Vega calls his kid brother Alfonso to run for his life while his car explodes during a chase on TV. It's radio-active, from transporting enough cobalt for a 'dirty bomb'. A secret agent links Roman to Peruvian terrorist organization Libertad Nueva. Autopsy concludes the corps is that of marine John Ross. Lawyer Margaret Allison Hart takes Alfonso's defense, just to cross Gibbs.