SAN JOSE >> A Santa Clara County jail inmate died Sunday evening at Valley Medical Center, nearly a month after he was admitted for chest pains, according to authorities.

The in-custody death is the county’s eighth of the year.

On Sept. 30, the man was booked on charges including felony elder abuse, grand theft and fraud, Santa Clara County sheriff’s Sgt. Russell Davis said in a news release Monday.

The inmate was taken to the hospital the following day, Davis said. The man’s condition later worsened, he added.

On Sunday, medical personnel performed emergency life-saving measures on the man in his room, where he was pronounced dead shortly before 5:30 p.m., Davis said.

The man’s identity was not immediately released by the Santa Clara County Medical Examiner-Coroner’s Office.

The sheriff’s office Major Crimes Unit opened an investigation into the death and reported no evidence of foul play, Davis said.