Say Keodara had first apologized to the victims but maintained his innocence.
"I'm sorry for the victims that they had to go through this," Keodara said before the judge. "I'm sorry for my 2-year-old daughter that's not going to see me over something I didn't do."
Keodara then tried to storm out the courtroom door, telling the guards they could Taze him or shoot him. "You keep telling me I did this, I didn't do it."
The judge ordered him hauled back into the courtroom, and then handed down a sentence of 69 years and 3 months in prison.
Keodara was 17 when he shot and killed Victor Parker in Sept. 2011. He was also convicted of seriously wounding three other young people in the shooting, which police say resulted from a botched robbery.
The survivors told police they were sitting in a bus shelter when a car stopped and someone inside asked if they wanted to buy cocaine. The car left the scene, but its three occupants returned on foot moments later.
One young man pulled a pistol and demanded that Parker and his two associates hand over their money, according to charging documents. Prosecutors said Keodara started shooting when one of the victims bolted. A woman who had been waiting for the bus was also wounded.
Prosecutors said images of the gunman were recovered from surveillance footage taken at nearby businesses. Detectives also determined mobile phone data placed Keodara near the slaying site.
Keodara was jailed shortly after the shooting on unrelated burglary charges. Questioned by police, Keodara allegedly denied any role in the slaying.
Keodara's attorney says they will appeal his sentence.