During the second interview days after his arrest for the killing, Aguila cried and admitted to shooting Rubio in self-defense. “I fired twice,” Aguila said in the recording played in Norwalk Superior Court. “I thought he was going to shoot. He was mad.” Detectives had no leads in Rubio’s slaying until two months later, on Nov. 20. That day, sheriff’s traffic-enforcement deputies stopped Aguila for a traffic violation and inadvertently found two letters that contained what they believed to be gang writing and what appeared to be a confession to the murder of Rubio. One letter, addressed to Aguila’s friend in New York, read: “Just about a week ago I killed someone my first time … I don’t lose sleep or feel bad. I actually laughed and told myself: `Finally I caught one.”‘ But, unlike the bravado expressed in the letters, Aguila was sullen and soft-spoken throughout the taped interviews. NORWALK – Members of both the victim’s and defendant’s families wept in court Tuesday as they listened to a long, emotionally-charged taped interview between homicide detectives and a suspected killer. Randy Aguila, 20, of Whittier is charged with killing Oscar Rubio, 26, of Whittier in a car-to-car shooting that caused Rubio to crash through a fence and into the parking lot of Aida S. Nelson Elementary School on Sept. 22, 2005. The prosecution played nearly four hours of taped interviews between Aguila and Los Angeles County Sheriff’s Department homicide detectives at the sheriff’s Norwalk station. Throughout the first three-hour interview, Aguila denied responsibility, and repeatedly said: “I didn’t do it.” He told detectives he regretted ever joining a gang and becoming addicted to methamphetamines. And, for much of the interviews, he mumbled and cried in heaving sobs, and soft, shaky sighs. After admitting to shooting Rubio, he said he did so because he was scared. “He yelled at me,” said Aguila. “He was cussing at me. I felt like he knew me and was coming after me.” The confrontation began when Rubio allegedly yelled a derogatory statement at Aguila, who was blocking traffic at the corner of Vicki Drive and Godoy Street, Aguila said. Confused, Aguila put his head out the window to get a better look at the man yelling at him, who drove past him, turned around and pulled up next to his car, he said. He continued to yell derogatory statements, and the two men glared at each other, he said. “I didn’t know this guy,” Aguila said. “He reached down and popped the door open. I panicked … I thought he was going to shoot. “He reached down … I shot him.” [email protected] (562) 698-0955, Ext. 3026160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!