219 South Dearborn Street, Chicago, Illinois 60604

FBI Chicago file 100-44501 contains two pieces of correspondence. The first, a September 22, 1967 memo from SA C. Leonard Treviranus, records that eleven-year-old Tom Mitchell of 7825 South Colfax, Chicago, telephoned the FBI on September 16, 1967, to report hearing a "weird" noise and seeing a "flash of light going north in the sky" at approximately 8:30 PM; the information was passed to Sergeant Eugene Ripka of the Army-Air Force 755th Radar Squadron.