A lawsuit alleges that doctors at a north suburban hospital wrongly cut off lifesaving care to a 22-year-old man who had overdosed on heroin. The suit, filed in Chicago federal court last month, claims medical personnel at Advocate Condell Medical Center in Libertyville inappropriately removed Randall Bianchi from a ventilator and allowed him to die in December 2012. The suit accuses the doctors of administering medical treatment designed to protect Bianchi's organs for donation when they should have been working to save his life. Bianchi's mother, Lydia Cassaro of Florida, brought the lawsuit, alleging the doctors disregarded her desire for her son to be kept alive.