BATON ROUGE, La. (BRPROUD) – An inmate died inside the East Baton Rouge Parish Prison on Sunday night.

Dyteon Simpson, 23, was found to be unresponsive around 8 p.m. and declared dead later in the evening.

Simpson was recently sentenced to life in prison for the murder of former LSU basketball player, Wayde Sims.

Simpson was in an inmate line when the discovery was made and “medical staff responded and rendered aid,” according to the East Baton Rouge Sheriff’s Office. A preliminary toxicology report from the East Baton Rouge Coroner’s Office indicated the possible presence of Fentanyl in Simpson’s body.

Investigators are awaiting the results of the autopsy on Simpson before declaring an official cause of death. EBRSO says the investigation into the passing of Simpson and possible contraband remains ongoing.

The Office of Public Defenders who represented Simpson offered condolences to his and Sims’ families.

The East Baton Rouge Parish Prison Reform Coalition members have demanded an investigation by an independent agency into Simpson’s death.

“Accountability and transparency of processes and policies and things. We understand the need for security in these areas. There should be a call for what type of administration, what type of oversight, what type of overview,” said Linda Franks, East Baton Rouge Parish Prison Reform Coalition.