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PG 9-2330 cate tet . 2c 4, During May and June of 1971,” continuing efforts, .[ have been made to develop suspects in this matter with ©” the U.8. Postal Inspector, U.S. Secret Service, Police : Department, Alcohol, Tobacco, and Firearms Division,:. 23°". all Pittsburgh, Pa., as well as the McKeesport, Duquesne, i and Homestead Police Departments.: Contact with these’ 20 °° 9 agencies during this period failed to develop any - information as to the writer of the letters involved.’ |... No logical suspects to date have been developed. Pers &