The 23-year-old man who died Thursday after sustaining a traumatic injury while being held at a state jail has been identified as James Borling-Salas.

The Honolulu Medical Examiner’s Office confirmed his identity today and an autopsy is pending,

Honolulu police opened a first-degree murder investigation in connection with the man’s death.

Borling-Salas was an inmate at the Oahu Community Correctional Center on Dec. 14 when he was found unresponsive with traumatic injury, and he was taken to a hospital, police said.

On Wednesday, he was discharged to hospice care where he remained until he died.

Police said the investigation was being handled by the state Attorney General’s Office and police will assist if necessary.