CHICAGO (CBS) — The Friday night death of a McHenry County Jail inmate is under investigation by authorities.

Thomas M. Doheny, 51, of Cary, was found unresponsive in his single-occupancy cell during rounds about 8:10 p.m. at the McHenry County Jail, 2200 N. Seminary Ave. in Woodstock, according to the McHenry County coroner’s and sheriff’s offices.

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Doheny was taken to Centrega Memorial Medical Center in Woodstock, where he was pronounced dead at 8:53 p.m., authorities said. An autopsy was expected Sunday.

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The death was under investigation by the McHenry County Major Investigation Assistance Team and the coroner’s office.

The sheriff’s office said Doheny had been held at the jail since Nov. 1 on a charge of contempt of court.

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