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vee eC pe eee re Sal Xv od ¥ SPECIAL INVESTIGATIVE DIVISION July 2, 1962 bal Background: U. S. Engineers office, San Fran- cisco, has advised that the tides at time of Alcatraz escape on ,;June 11, 1962 would have caused a free flowing body to flow out to the Pacific under Golden Gate Bridge. Because of force of tides, reaching of Angel Island would have been difficult. Water temper- ature was 50 to 54 degrees. All bodies locatedin the Bay area being closely checked for possible identification with the escapees, Intensive investigation continuing for any possible trace of the i st as, eee