Corrections deputies say they found an unresponsive inmate during a routine security and welfare check Saturday afternoon.
Deputies say they called for medical assistance and began CPR right away.
Multnomah County's medical examiner is investigating the cause of death, and the sheriff's office says detectives are working the case to find out how the woman died.
She was identified Monday as 25-year-old Latina Brogdon.
Deputies say initial information indicates there was no foul play involved, and there was no evidence of trauma.
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