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“os ¥ prev ™ Owal FORM NO. 16 10-106 . GOts Gin, tig. HO. aF -_ p UNITED STATES Cc RNMENT oO . v Memorandum ro: ~~ +~Mr, Mohr | DATE: March 31, 1971 FROM; J. J, Cas r ; suyect: | THREAT TO BLOWUP U. S. SUPREME COURT BUILDING 1:38 P,M, DURING WEEK OF APRIL 5, 1971 BOMB THREAT = f ae: is in charge of the U. S. Supreme Court XS - Police has just advised that Judge John Marshall Harlan is in receipt of a letter ae which threatens to boyd the Supreme Court Building at 1:38 p.m. sometime bv during the week of April 5, 1971. The letter postmarked March 28, 1971, in 7 (Pittsburgh, Pennsylvania, claims that the bombing will be done by the White Se Bie Panther Party of Michigan as part of the national radicals bombing week. 7 remarked that Chief suse Burger has requested that the FBI once again N fzk the security of the U. S Pe upreme Court Building as a safeguard against ~ nate the threats explicit in this letter. mPa forwarded the letter by mail to the FBI md RECOMMENDATIONS: ~~~ . . (1) That this matter be referred to the Washington Field Office for £ investigation, = f . 3 QW» Sop RECORDED 4 176 APR S 1971 _@) That the letter in question be forwarded to d to the EPI Laboratory xamination. upon receipt. i Yh / SS