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164-81 PAGE TWO SACRAMENTO ADVISES MAP OF ROUTE FURNISHED TO ALL RESIDENT AGENTS IN NORTHERN CALIFORNIA TO ASSIST LOCAL LAW ENFORCEMENT OFFICERS IN EVALUATING ANY INFORMATION RECEIVED. NO INDICATION ANY INDIVIDUAL CONNECTED WITH HIJACKING HAS SOUGHT MEDICAL AID ALONG FLIGHT ROUTE. PORTLAND ALSO CHECKING LARGE NUMBER OF LOOK ALIKES, ESSENTIALLY NEGATIVE RESULTS. PORTLAND NEWPAPER RECEIVED LETTER PURPORTED TO BE FROM HIJACKER. THIS LETTER FORWARDED TO BUREAU. LOS ANGELES HAS INSTITUTED INVESTIGATION TO POSSIBLY IDENTIFY HIJACKER THROUGH COOPERATION[ ss on [__Jovorz sxy DIVING ENQUOTE PUBLICATION AT LOS ANGELES, AND IN COOPERATION WITH THE U.S. PARACHUTE ASSOCIATION, WITH HEADQUARTERS AT MONTEREY. THIS SURVEY WILL BE BASED UPON DESCRIPTION OF THE HIJACKER. DB Cooper-2715 H