Updated 02/03/11 — 2:18 p.m.

CHICAGO (CBS) — The deaths of two men initially believed to be possible victims of the cold were determined to be natural deaths on Thursday.

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John Carson, 46, of the 9900 block of South Clyde Avenue, was found dead in his home on Wednesday. There was no heat working in his home at the time, according to the Cook County Medical Examiner’s office.

An autopsy Thursday determined Carson died of chronic alcoholism and his death was ruled natural.

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Also Wednesday afternoon, a homeless man’s body was found in an alley behind an apartment building at 3049 W. Fullerton Av. in the Logan Square neighborhood. The man, believed to be in his 50s, was pronounced dead at Norwegian-American Hospital.

An autopsy on Thursday determined that the unidentified man died of cirrhosis of the liver, according to the medical examiner’s office.

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The Sun-Times Media Wire contributed to this report.