Jorge Tellez, 21, remains on the loose and is considered armed and dangerous. Police say they served a search warrant on Tellez's Livermore home, but he wasn't there.
RELATED: Police search for witness after 16-year-old boy fatally shot in Livermore
Investigators say on July 8, Tellez was involved in an argument with the teen at the Taco Bell on Stanley Boulevard. Police say during the altercation, Tellez pulled out a gun, shot the boy and then ran from the scene. The teen was rushed to the hospital and later died from his injuries the next morning.
Officials have not released the victim's identity, but friends say he was a football player and a musician at Livermore High School.
RELATED: Manhunt for suspect who shot, killed 16-year-old in Livermore in Taco Bell parking lot
A memorial remains outside the Taco Bell where the victim was killed.
A memorial is still sitting outside the Livermore Taco Bell where a 16-year-old boy was shot. He died from his injuries. If you have any information that can lead to an arrest, please contact police. The suspect is 21-year-old Jorge Luis Tellez @abc7newsbayarea pic.twitter.com/NyW4EQVg0l— Jobina Fortson (@JobinaFortson) July 19, 2019
Police are asking the public to contact them with any information.