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TELETYPE TO SAN FRANCISCO HEARNAP 715200 BY THE MARS EQUIPMERT CORPORATION, CHICAGO, ILLINOIS, 0 MECHANISM MARKS FOUND ON REPRESENTATIVE NUMBER OF THESE CARTRIDGES EXAMINED TO DATE. VACUUMINGS FROM 1973 FORD LTD AND 1974 AMC BORNET ARE TYPICAL OF AUTOMOBILE DEBRIS WHICH ACCUMULATES DURING MORMAL EVERYDAY USAGE. MIXED AMD CONTAMINATED CONDITION OF THESE SPECIMENS REDUCES THEIR VALUE FOR LEAD OR COMPARISON PURPOSES. MOWEVER, VACUUMINGS FROM REAR SEAT AND FLOOR OF AMC HORNET CONTAINS NUMEROUS BLACK SILICA SLAG PARTICLES AND A FEW METAL SHAVINGS. THEREFOR, LIKELY THAT THE PERSON OR PERSONS USING THIS VEHICLE WERE IN A STEEL OR TRON MANUFACTURING AREA "INASMUCH AS BLACK SILICA IS A COMMON BYPRODUCT OF SUCH THES we a. AREAS. ALSO, IT IS MOTED THAT BLACK SILICA SLAG IS fs ALSO COMMONLY USED IN SAND BLASTING OPERATIONS SUCH a AS THOSE CONDUCTED AT WAVAL SHIPYARDS. Lee WITH RESPECT TO SIERRA BULLETS DESCRIBED IN RETEL, / + WOTHING FOURD TO INDICATE THESE POSSIBLY ASSOCIATED WITH so: SPECIMENS SUBMITTED TO DATE IN HEARNAP AND RELATED j Dap. AD Adm. . oe” ~=—Ss« MATTERS. / Admin. : mar ts LATENT FINGERPRINT RESULTS BEING REPORTED SEPARATELY, €or eee EXAMINATIONS CONTINUING, REPORT FOLLOWS. ; Went. ei @2 : Laboretery Plas. & Evel. ioe. tev. retning : ype! Coven. d plo phone Km. ecto fecty_.. «Sss«Ss MAIL ROOM(T_] ‘TELETYPE UNIT (_] 7 - BS {