LOS ANGELES (CBSLA) — Opening statements began Monday in the case against a Palmdale man charged, along with his girlfriend, with capital murder in the beating death of the woman’s 8-year-old son.

Prosecutors are seeking the death penalty against Isauro Aguirre, 37, who is charged in the May 22, 2013 death of Gabriel Fernandez. Pearl Sinthia Fernandez, 34, and the mother of Gabriel, will tried separately on similar charges.

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Young Gabriel’s death triggered investigations into the county’s child welfare system and resulted in criminal charges of child abuse and falsifying public records being filed against two former county social workers and two of their supervisors.

As jury selection began late last month, Superior Court Judge George G. Lomeli said the boy “extensive internal and external injuries.”

Lomeli said the trial is expected to last about six to eight weeks.

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Los Angeles County Fire Department personnel were sent May 22, 2013, to a home in the 200 block of East Avenue Q-10 in response to a call that the boy was not breathing. He was declared brain dead that day, but not taken off life support until two days later.

The prosecution has alleged that the child suffered a fractured skull, several broken ribs and was burned over his body.

In court papers filed last year, Deputy District Attorney Jonathan Hatami wrote that a first-grade teacher made a report to authorities about Fernandez allegedly hitting her son with the metal part of a belt, causing injury.

“This was essentially the beginning of the eight months of torture and abuse of Gabriel Fernandez by Pearl Fernandez and Isauro Aguirre in Palmdale,” the prosecutor wrote, adding that the boy was “withheld from school by the defendants for the last three weeks before he was murdered.”

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