Andres Guardado was killed on June 18 after multiple shots were fired by a Los Angeles County sheriff's deputy. An independent autopsy, performed at the request of his family, has found that the 18-year-old Guardado was shot five times in the back, and died as a result of these gunshot wounds.

Andres' parents, Cristobal and Elisa Guardado, said the autopsy confirms "what we have known all along, which is that Andres was unjustifiably killed by a Los Angeles County Sheriff's deputy."

The preliminary forensic toxicology results also found that Guardado had no drugs or alcohol in his system at the time of the incident.

The Los Angeles County Sheriff's Department has put a hold on the official autopsy report from the LA County medical examiner while the department's homicide division investigates.

Days of demonstrations followed Guardado's killing, with protesters demanding justice.

"Andres was a good boy, he was our son and he had so much life ahead of him," his parents said in a statement. "Our son did not deserve to die this way. We understand that there is still a long way to go, but we are going to continue to keep fighting for justice for Andres. We want to ensure that other families do not have to suffer as we have. We ask that the Los Angeles County Sheriff's Department release their security hold on the autopsy report and all other evidence they have. We want answers."

Commander Chris Marks of the LA County Sheriff's Department said Wednesday that the hold on the official autopsy was necessary while investigators conduct witness interviews, so that the investigation is not tainted.

"We do understand the desire of the Guardado family to have answers sooner rather than later," Marks said in a media briefing Wednesday afternoon. "We also accept and understand our obligation to be transparent. Simultaneously, we are conducting a homicide investigation. All officer-involved shootings that result in a death are just in fact that – a homicide investigation. We take our obligation to gather all facts and protect the integrity of a homicide investigation very seriously."

Marks says that two officers, whom he declined to name, were involved in the incident: one who fired six shots, and another who did not fire his weapon. The officer who did not fire any shots has been interviewed by investigators, but the officer who fired the shots has not yet done so.

Marks offered few details of the incident, citing the ongoing investigation. The shooting took place in Gardena, Calif., in southwestern LA County.

"What's been reported to us preliminarily is that the deputies observed Guardado with a firearm. And the firearm was recovered at the scene," he said, adding that there is no indication that Guardado fired any shots. The officers were in a marked patrol car and wore full uniforms, he said.

The sheriff's department says it may release the official autopsy report once it completes the interviews for its investigation.

But the Guardado family doesn't want to wait any longer.

"It has been 20 days since Andres was tragically gunned down by a Los Angeles County Sheriff's deputy," attorney Nicholas Yoka said in a statement. "We are once again imploring the Sheriff's Department to step forward, release the Medical Examiner's autopsy report and do the right thing by this family."

Copyright 2020 NPR. To see more, visit https://www.npr.org.