Alameda County, California - A 26-year-old man died on April 19 in police custody in Alameda County. Alarming footage now shows how the officers pinned Mario Gonzalez face down on the ground for roughly five minutes before he went unresponsive.

Body camera footage was released by the Alameda Police Department on Tuesday.

The disturbing footage shows Mario Arenales Gonzalez becoming unresponsive while in handcuffs and police officers beginning chest compressions.

Gonzalez died just one day before Derek Chauvin was convicted of murdering George Floyd by pinning him down to the pavement with his knees for nine minutes and 29 seconds.

Crime FBI reportedly opens criminal probe into Baltimore bridge collapse

A police report last week from Alameda detailed "a physical altercation" when officers tried to arrest Gonzalez, adding that he happened to have "a medical emergency" at that time. The report went on to claim Gonzalez had died in a hospital later that day.

Julia Sherwin, a lawyer representing Gonzalez’s family, compared the police report to that after George Floyd's death, saying it was full of "misinformation," according to the New York Times.

"His death was completely avoidable and unnecessary," she said. "Drunk guy in a park doesn’t equal a capital sentence."

The newly released footage shows the officers unable to find a pulse on Gonzalez, having kneeled on his back for five minutes.

They can be heard asking for his name and birthday, and telling him to keep talking. Gonzalez can only whimper and begins grunting loudly, clearly struggling to breathe.

When one officer asks if it was time to roll him on his side, another says, "I don’t want to lose what I got."

At a news conference on Tuesday, Gerardo Gonzalez said that the police officers killed his brother, adding that his brother had not been posing any threat when he died.

The three police officers who were involved have since been placed on administrative leave. In the meantime, the local sheriff's office and the Alameda County District Attorney’s Office have begun with independent investigations.