An inmate has been charged after the body of another prisoner was found at Sydney's Silverwater jail earlier this week.
Corrections staff discovered the 63-year-old on the floor of his cell about 11.30am on Tuesday, police say.
Despite their efforts to revive him, he was declared dead by ambulance paramedics.
A crime scene was established, which was examined by specialist forensic officers.
Local detectives from Auburn arrested a 29-year-old inmate at the Silverwater facility on Friday afternoon.
He has been charged with murder and was due to face Parramatta Bail Court on Saturday.
Australian Associated Press