An inmate serving time on Alabama’s death row died Tuesday morning at Holman Prison.

According to Kristi Gates, public information spokesperson for the Alabama Department of Corrections, 49-year-old Ricky Adkins was pronounced dead at approximately 2:35 a.m. Tuesday at the prison’s infirmary.

Gates said that the cause of death is currently undetermined, and is pending autopsy results from the Alabama Department of Forensic Sciences.

Adkins was convicted of capital murder in St. Clair County on Nov. 21, 1988, and was sentenced to death. He had served 25 years, seven months and eight days on Alabama’s death row.