Even before Oppenheimer was chosen to be the lead scientist of the Manhattan Project, he was under surveillance by the Federal Bureau of Investigation (FBI) due to suspected Communist views. Once selected, the surveillance was constant: every single phone call was recorded and every contact with another person was noted. After he was picked to head the laboratory, he met with Tatlock only one time, in mid-June 1943, where she told him that she still loved him and wanted to be with him. After spending that night together, he never saw her again. She died by suicide six months after their meeting.