CHICAGO, IL (WTAQ) - A Wisconsin pilot from Cedar Grove was among three people killed in the crash of a small plane near Chicago. William Didier had been a flight instructor for more than 40 years. He had notified officials about a fuel problem before the twin-engine Pipe Navajo went down near Riverwoods, Illinois. It was coming from Palm Beach, Florida. Two passengers were also killed in the crash, which is being investigated by federal officials.