A Kennewick firefighter who hung himself in jail last week after being accused of sexually assaulting a young girl died Thursday morning.

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A Kennewick firefighter who hung himself in jail last week died Thursday morning, officials said.

Ryan Gladstone, 34, had been at Kadlec Regional Medical Center in Richland since Jan. 18, after he was found hanging by bedsheets inside his cell at the Franklin County jail.

Benton County Coroner John Hansens said he received a call around 9:30 a.m. Thursday from hospital staff who said Gladstone had died. He said an autopsy will be performed.

Gladstone, who joined the Kennewick Fire Department in 2007, had been accused of sexually assaulting a young girl and had been in the Franklin County jail since Jan. 13.

He was being held in a single-occupancy cell in protective custody in Franklin County because he previously worked as a corrections officer in the Benton County jail.

He was found hanging in his cell by corrections officers on a normal rounds check.

On Jan. 19, Gladstone was charged in Benton County Superior Court with first-degree child molestation. He is accused of being under the influence of Spice, a synthetic cannabis, when he allegedly molested the girl this month.

Gladstone was put on leave after his arrest. He and his wife, Lindsay, were going through a divorce and she obtained a one-year protection order against him Jan. 18.