SACRAMENTO (CBS13) — On Wednesday, an inmate who was released from custody died at the hospital from a pre-existing medical condition, said the Sacramento County Sheriff’s Office.

The 59-year-old inmate had been booked at Sacramento County Main Jail for a violation of parole stemming from felony narcotics charges.

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The inmate had been having back pain and trouble breathing several days before, however, no visible injuries or trauma were suspected.

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It is unclear what caused the inmate’s death, however, COVID-19 has been ruled out.

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No additional information has been released at this time.