The years haven’t dulled Amos Brown, Sr.’s pain or resolve.

“Ain't nothing changed in my mind from that day to now,” he told News 12 on the eve of the anniversary of his son’s murder. ”I want justice, no doubt about it.”

Amos Brown, Jr., 18, was shot in the back of his head while in a car on Lexington Avenue on Aug. 13, 2010. He survived the gunshot wound but was taken off life support two days later at the hospital.

“I had to play a part in his death because I had to turn off the switch,” said Amos Brown, Sr. as his voice broke. “He was my strength and my weakness. That's what he was, and I think about it all the time.”

Amos Brown, Jr. was killed about a year after he walked out of Stamford Superior Court acquitted of killing another teen by argument of self-defense. That teen, Tykwan Hunt, was known to be a member of a local gang.

“That gang was called the Money Greens,” Amos Brown, Sr. said. “They were determined to murder my son.”

Norwalk police said at the time that Amos Brown Jr.’s murder was retaliation, but the case remains unsolved today.

“It's been a very lengthy investigation and while there is information that our detectives uncovered as far as who was there, who may have been involved, everyone still remains relatively silent,” Lt. Terry Blake said Friday, adding that the case remains active. “The state's offering a $50,000 reward for any information that leads to the arrest and conviction of any individual or individuals responsible for Mr. Brown’s homicide”

Amos Brown, Sr. told News 12 he believes people have been afraid to come forward but urged them to do so now. “The community knows who did it. They need to tell the policemen.”

Despite all the time that has passed, he's still optimistic an arrest will happen one day.

“Yeah, I have faith,” Amos Brown, Sr. said. “The police will do their job, but they need help.”

Anyone with information is asked to call the Norwalk Police Department Investigative Service Bureau at (203) 854-3111 or Det. Chris Imparato at (203) 854-3190. You can also leave an anonymous tip by calling the tip line at 203-854-3111; submitting at tip at www.norwalkpd.com or texting a tip by typing "NORWALKPD" into the text field, followed by the message, and sending it to TIP411 (847411).