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Story summary
- An off-duty Cook County Sheriff correctional officer was shot during a River North nightclub altercation.
- Three men, ages 24, 25 and 22, were wounded, with the 24-year-old critical and the others stable.
- Police arrived around 3:40 a.m. near North Clark and West Erie streets and found shell casings.
- Area Three detectives are investigating and the gunmen fled the scene.