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Kr. R Rese Mr. Pri sai” ULECIOWN SULG ST STEN POSS) ARKO March 16, 195) OAKLALT, CALI? Shoda SEATON JOBLP.: iC CAL win EXTCRTIOl The Senator by letcor detud March 2), 1 oo cage & lotter to the Mureau whiel: he felt eatained « threat aga . him. The Senator's letter wes ac: imowledged on yareh 30, 49 ile Was advised that in view of the possible threat invest ioeteon ap would be institutec. (Phote of etter and envelope attashed} {/ The San Vranc’?sco Siviicion contacted <he United « States Attorney for an opinion anc he advised that he deferred. op: nion recarding prosecution ant roguosted investigation in an. astcupt to locate ant intervio: toe unlmown subject. Con= aiderable investication wag conducted b the ras F os see without idensify img the: subjeei By airte) dated fr J Se ‘ecu, ine ins Le) viaton ae vined investipa us far was vecetives at the tv. Se attorney at Ban anciseo was resoulagtes. ses roseeution was declinod. c) in Se Attorney advis because of the political n the letter it teandetea aes anyone -of an imited ap pee of the ee : mi gt have written the lettar Beser ore, further tnvestte ion was unwarranted, 3 action is being taken in ¢ “Da c) t being advised of the resui £4556 Tne above is for § pears