Three men arrested in connection with the March 2012 shooting death of a 14-year-old boy in the Mount Hope area of San Diego are scheduled to be arraigned today at the downtown courthouse.
 
Arnold Celaya and Angel Burquez, both 22, and Antriel Matthews, 23, are charged with murder in the March 24, 2012, fatal shooting of Richard Carrillo.   

Carrillo -- known to loved ones as Little Richy -- was gunned down in the south alley of 3500 Island Avenue around 8 p.m.
 
The eighth grader was sitting on the tailgate of a parked pickup, talking with friends, when a dark SUV rolled up and two men in their 20s got out and starting shooting, according to police.
 
The gunmen then got back in their vehicle and fled westbound.
 
Carrillo, who attended Millennial Tech Middle School, turned 14 three weeks before his death.