Transcript for Teen Killed Over Loud Music: Did He Have a Weapon?
music at the center of it. He asked a group of teenagers to turn down the volume. But then pulled out a gun and opened fire. There was a rare Saturday court session, and ABC news's Linzey Janis has the latest. Good morning. It all started 16 months ago on black Friday when the defendant Michael Dunn parked outside of a gas. He asked them to turn down the volume, they did, but when they turned it back up, one is dead. According to prosecutors, Jordan Davis seen in this exclusive youtube video was unarmed when he was murdered by Michael Dunn for playing loud music. A detective testifying he found in weapons in the parked SUV where they sat outside a Jacksonville gas station. You see any evidence in any of these locations of weapons? No, I did not. Lawyers say he was defending himself after he heard threats and saw a gun inside the SUV. In an emotional testimony, Dunn's fiance inside the gas station when the shots rang out -- Somebody's shooting zblsh. Describing that fal night. What did the defendant say? I hate that music. On Friday, Davis' friends answering questions too. Isn't true the music was so loud that the windows and mirrors were vibrating. Yes, sir. Testify whg Dunn parked next to them, they did. But davismented it turned back up. What did Jordan Davis say? Turn the Music back up. To you or someone else? To me. They say he pulled out a gun and fired nine rounds. Then the boys realizing their friend was shot. Was he making any shots you could hear? Yes, sir. Like what? Gasping for air. In the courtroom, Davis' parents wiping away tears, reliving their nightmare. Dunn has been charged with first degree murder and faces three counts of attempted first degree murder for shooting at the three other thes in vehicle. It's being compared to the yves Von martin case. There was no question there was an altercation. It may be hard to prove self-defense. And in the same state as well. Thank you.
This transcript has been automatically generated and may not be 100% accurate.