 On July 5 , Muenter ( who went under the pseudonym Frank Holt ) burst into the Glen Cove , New York home of Jack Morgan , son of financier J.P. Morgan , demanding that he stop the sale of weapons to the allies . Morgan told the man he was in no position to comply with his demand ; Muenter shot him twice and escaped . Muenter was later apprehended and confessed to attempted assassination of the Vice President . Marshall was offered a personal security detachment after the incident , but declined it . Marshall had been receiving written death threats from numerous " cranks " for several weeks . " Some of them were signed , " Marshall told the press , " but most were anonymous . I threw them all into the waste basket . " Marshall added that he was " more or less a fatalist " and did not notify the Secret Service about the letters , " but that he naturally was startled when he heard of the explosion at the Capitol . " 
