This undated photo shows a Cessna 206. (AP Photo/Cessna)

The body of a doctor killed when a medical flight crashed into Lake Michigan last month has been found, but the search continues for the plane’s co-pilot, authorities said Sunday.

The small plane was headed to the Mayo Clinic in Rochester, Minn., with a cancer patient and four others on board when it developed mechanical problems and crashed July 23. The 66-year-old pilot, Jerry Freed, was the only survivor and was rescued that day.

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Bodies belonging to Alma school superintendent and cancer patient Don Pavlik and his wife, Irene, were recovered Friday, and the Mason County Sheriff’s Office said a third body was recovered Saturday night. A medical examiner told the Ludington Daily News on Sunday the body had been identified as Dr. James Hall.

Co-pilot Earl Davidson remains missing.

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All on board lived in Alma, a central Michigan town 150 miles northwest of Detroit.

The Cessna 206 took off from there about 9 a.m. Less than an hour later, Freed reported mechanical problems to the air traffic control tower in Minneapolis, said the Federal Aviation Administration, which was investigating the crash.

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