the german infiltration by u-boat in 1942 was foiled by
Operation Pastorius Shaken but not discouraged, Dasch ordered Burger to stay put and keep an eye on the other men. On 15 June, Dasch phoned the New York office of the FBI from a pay-telephone on Manhattan's Upper West Side explaining who he was and asked to convey the information to FBI Director J. Edgar Hoover. When the FBI agent was trying to figure out if he was talking to a crackpot, Dasch hung up. Four days later, he took a train to Washington, D.C. and checked in at the Mayflower Hotel. Dasch then walked into the FBIâ€™s headquarters carrying a briefcase, asking to speak with Director Hoover. Dasch bounced from office to office until finally Assistant Director D.M. Ladd, the agent in charge of the manhunt, agreed to humor him with five minutes of his time. Dasch angrily repeated his story after he was dismissed as a crackpot by numerous agents. He finally convinced the FBI by dumping his mission's entire budget of $84,000 on the desk of Assistant Director D. M. Ladd.[15] At this point, he was taken seriously and interrogated for hours.[16] Besides Burger, none of the other German agents knew they were betrayed. Over the next two weeks, Burger and the other six were arrested. FBI Chief J. Edgar Hoover made no mention that Dasch had turned himself in, and claimed credit for the FBI for cracking the spy ring.[17]