Grant Parker, 34, was in custody at the San Diego Central Jail downtown March 8 when sheriff’s deputies found him hanging inside his assigned cell. He was housed alone, according to authorities.

“Upon observing the situation, the deputies immediately activated 911, requested assistance from the facility’s medical staff, and began life- saving measures,” SDSO Homicide Lt. Juan Marquez said. “Paramedics and the San Diego Fire Department assumed life-saving measures upon their arrival, and Mr. Parker was transported to a local hospital. Despite all efforts, he was pronounced deceased at the hospital on Tuesday, March 10, 2026, at approximately 1:15 p.m.”

Parker was arrested by San Diego Police Department officers on Feb. 14, 2026, and was facing charges of murder and assault with force likely to produce great bodily injury.

“The San Diego Sheriff’s Office extends our sympathies to the decedent’s family and all those affected by his passing,” Marquez said. “A Sheriff’s Family Liaison Officer will continue to support the family during this difficult time.”

The Citizens’ Law Enforcement Review Board was notified about the death. As is the protocol for all in-custody deaths, the sheriff’s Homicide Unit is conducting an investigation.

The cause and manner of death will be determined by the San Diego County Medical Examiner’s Office.

San Diego County has been under intense scrutiny for years over its unusually high number of in-custody deaths. In 2022, the California State Auditor found “deficiencies with how the sheriff’s department provides care for and protects incarcerated individuals (that) likely contributed to in- custody deaths.”

That audit examined 185 deaths within the San Diego County jail system from 2006 through 2020, a rate that exceeded all of California’s other large counties during that time period. The county had 19 custody deaths in 2022 alone, and another six in 2023.

The Sheriff’s Office has committed to a $500 million effort to modernize and upgrade its jails, but advocates have questioned whether those efforts are sufficient.

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