they have a little card, and they can tell you what the card says. >> narrator: gary myers, justin sharratt'sorney, has been practicing military law since arguing the my lai case during the vietnam war. he contended sharratt's actions were justified under the rules of engagement, because sharratt said he acted in self-defense. >> he saw an ak-47 being raised at him, and he reacted instantly and with precision, as he is trained to do. >> do you swear the statement you're about to make will be the truth, the whole truth...? >> narrator: but iraqi witnesses from house 3 told a very different story-- a story of deliberate, execution-style killings. the prosecution said the iraqi witnesses declined to testify in person, but frontline has obtained some of this testimony, videotaped in iraq, which the prosecution used to build its case against sharratt. the witnesses swore the marines took everyone out of houses 3 and 4, forced the men to give up their weapons, separated them from the women and children at gunpoint, and led them into house 4. after the marines left, the witnesses said, they found th