George de Mohrenschildt

George Sergius de Mohrenschildt (April 17, 1911 – March 29, 1977) was a Russian born American petroleum geologist, anti-communist political refugee, professor, and occasional CIA informant. He moved to the Dallas area in October 1961, and befriended Lee Harvey Oswald in the summer of 1962, the year before the assassination of John F. Kennedy. A Russian emigrant who was born into an aristocratic family in Tsarist Russia, he ran in high social circles and was friends with Jacqueline Kennedy, the future wife of the president. While still a young boy, his wealthy family fell victim to the communist revolution, and they fled to Poland. He emigrated to the United States in the late 1930s, where his brother worked for the OSS during World War II.

De Mohrenschildt met Oswald in 1962. By most accounts, he treated Oswald with respect. After the assassination, de Mohrenschildt testified before the Warren Commission investigating the assassination, in which he minimised their relationship; his testimony was one of the longest of any witness.

In March 1977, de Mohrenschildt died by apparent suicide while waiting to testify before the House Select Committee on Assassinations. His different accounts of Oswald at different times and his CIA links had led to several assassination conspiracy theorists to question his relationship with Oswald.