but prosecutor ammon barker tells jurors jones' story is riddled with lies for one reason.ecause he is trying to bolster a bogus self-defense claim. >> we know he was punched in the face. but what he did afterwards has nothing to do with self-defense and everything to do with retaliation. >> reporter: jurors head out to begin deliberations. and as the hours, then days pass, five families are left to wait and to worry. i know you're not in the mindframe of blaming -- >> the parents. i blame the parents. i blame the parents. he was a young kid. he was taught to shoot silhouettes. not even, like, tin cans like you would think if you're teaching a kid. but this was the way he was raised. and he did what he was trained to do. >> reporter: when we come back, the jury deciding the fate of steven jones has a stunning message for the judge. >> mr. foreperson. >> reporter: and for us, too. >> i was juror number two in the steven jones trial. >> reporter: when "20/20" continues. jimmy's gotten used to his whole yup, he's gone noseblind. odors. he thinks it smells fine, but his mom sme

. >> reporter: prosecutor ammon barker argues steven jones was a calculating cold-blooded killer. >> question for you during this trial will be what was the defendant's intent when he shot these four unarmed victims. >> reporter: it's a question the defense is eager to answer in its opening statement. >> this is a case about an 18-year-old kid who found himself in a situation where he was surrounded, bullied, threatened, and attacked and did what he had to do to protect himself. >> reporter: but the young men who were shot dispute that. insisting no one threatened steven. >> i wouldn't even say it was an aggressive situation. it was a verbal argument from what i could see. >> the people who say that steven jones was just defending himself against a bunch of bullying frat guys. >> that's his defense. never even saw the kid until he came back with a gun. so. >> the trial lasts almost two weeks, and the testimony does little to clarify what actually happened that night or even how it all started. then steven jones does something rarely done in a first-degree murder trial. >> hello. my n