An investigation is underway after a Shelby County Jail inmate died over the weekend.

The Shelby County Sheriff’s Office identified the inmate as Joshua Dewayne Files. He was 29 and lived in Bessemer.

Files was booked into the Shelby County Jail on June 6 on an outstanding warrant for a probation violation on a previous first-degree theft of property, sheriff’s officials said.

Authorities said he underwent a medical and mental health assessment during booking, which is standard procedure for all jail inmates. He was then placed in a general population housing unit.

On June 13, officials said, Files “displayed erratic behavior” and was moved to a special housing cell where jail watch protocols were initiated.

On Thursday, June 15, jail deputies performing a routine safety check found Files to be suffering a medical emergency, sheriff’s officials said. Deputies and jail medical staff immediately began life-saving measures, and he was taken by ambulance to the hospital.

Files was pronounced dead at 9 p.m. Saturday.

Sheriff John Samaniego has requested the St. Clair County Sheriff’s Office to conduct a review of Files’ death. The Alabama Department of Forensic Sciences will conduct an autopsy to determine the cause of death.

Shelby County Coroner Lina Evans said there was no sign of trauma, foul play, or suspicious circumstances.

“We express our sincere condolences to Mr. Files’ family during this difficult time,’’ Samaniego said in a prepared statement.