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Exec AD Adm. __ Memorandum enc a0 es 1- Mr. Kelleher Wecaee “eh Bis 1 - Mr. Cronin = Crim. fav. — = ident, lotall. Laboratery tT :Mr. Cronin fat © Date 7/14/81 Peek Rec. Mgnt. _ LA Tech. Sores. From :R. W. Aaron Ott of Cong. . \ & Public Affs._ { 3 | Telephone Rm, Subject .ATKID (7- 18251) Director's See’y -- MAJOR CASE #30 OO: ATLANTA PURPOSE: To advise of the status of toxicological work in ATKID. DETAILS: Complete toxicological examinations have been conducted on specimens from victims Timothy Hill, Larry Rogers and William Barrett. Tissues from Michael McIntosh and Nathaniel Cater were examined for dimethylsulfoxide. A general screening examination is being conducted on. tissues from Nathaniel Cater, the victim for whose murder a suspect has been charged. This examination is restricted due to the poor quality of the~ submitted specimens. None of these examinations have indicated a drug, | — C ; poison or other unnatural chemical substance. 4Y i While all logical courses have been pursued and test conducted were as thorough as possible, there remain many thousands of compounds which could have been used and still escape detection in these screening procedures. At this point the task becomes a matter of a random selection of one of these unique substances and conductidg tests specific for that substance. The tests for each material would take hours to weeks. In the absence of specific leads, this would appear to be unreasonably inefficient. The Atlanta Office has been requested to review the background of the chief suspect in the case for names of any particular drugs or other chemicals with which he may be associated. No such substances have been developed to mares SAL, oo fir RECOMMENDATION: That upon completion of the examinations on Cater's tissues, no further examinations should be conducted without specific leads developed through investigations ongoing in Atlanta. The tissues will be retained in the Laboratory for six months against the possibility of the need for additional tests. APPROVED: Adm. Servs. Laboratory Crim. inv. Legal Coun. forgo To 718251 ce Deector nim. fav. _ eat for OB 131 ars Li - n= 162 i warec lor Oe Co -—- oof 4 oF Exec. AD-Adm. Kent. Tech Seve — —ae Training Ke ite wee! - Exec. AD-Inv. ss Inspection Of. of Conga” a Exec. AD-LES intell. & Public Affs, . “RWA: bid ( ) . 247 Fe