An off-duty Chicago police officer is dead and a woman is in critical condition after a carbon monoxide leak Tuesday night at a home on the city's Northwest Side, authorities say.
First responders arrived at the home in the 3900 block of West Ainslie Street in the Albany Park neighborhood just before 8 p.m. to find two people unresponsive inside, according to police.
The 36-year-old man and 29-year-old woman were taken to Swedish Hospital, where the man was pronounced dead and the woman remained in critical condition early Wednesday.
The man was an off-duty Chicago police officer, the department said. Further details, including his identity, were not immediately available.
The investigation into the incident remains ongoing, officials said.