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A man died after collapsing in Assumption Parish jail Sunday morning. He was arrested and booked on DWI and related counts Saturday evening, almost exactly 12 hours before his death, authorities said. 

Edward Murphy Jr., of Labadieville, collapsed in his cell around 6:25 a.m. Sunday, according to a news release from the Assumption Parish Sheriff's Office. Jail employees noticed him in distress, followed emergency protocols and called an ambulance.

Murphy, 54, died at Thibodaux Regional Medical Center shortly after 8 a.m. 

He had been booked into the parish jail by Louisiana State Police the day before on counts of DWI, driving with a suspended license, and expired motor vehicle inspection tag. 

Assumption Parish Sheriff Leland Falcon said in the news release that Murphy was being held in a temporary housing area and was housed alone. 

A full review of the incident is underway, but authorities said they believe Murphy died as a result of illness. He had a documented history of cardiovascular disease.

An autopsy will be performed to determine the cause of death. Murphy's age was not immediately available.

Compiled from staff reports. To contact a crime reporter at The Advocate, email or call (225) 388-0369.