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| She unknown volee in the second pertinent telerhone LO eGnversation 6n apeciten <17 and the known voica of QED on srecizen F15 were subjected to spectrographic exanination, which revealed gore spectral and aural sic ‘dierities, possibly asscciated with the sare speaker. The unknewn voice in the first pertinent telechone £7 conversation on srecicen G17 and the knovn voice of SI? on specinen E20 were subjected te spectrographic exarination, which revealed spectral and aural éivoidlarities, normally associated with Gifferent speakers, The unknown voice in the second pertinent telechone 47¢0—- conversation on speciven C17 and the hnown voice of on speciren F20 were subjected to spactrographic eranination, whitch revealed too few comperable words to nake a neaninefol coupariaon, Veice Identification hy the spectrojgraphic rethed is not consitereé a positive means of apeaker identification and the results of such exasineticns are furnished for tnvesatigative guicance on le wees 7 © frmecitens 97, ¥iS, and F20 have previously besn forwarded to your office, via registered mail. Page Two AG2L10630 © Of * LOZIS07E E QZ