He appeared in New York City about 1893. In the 1890s "..he had a Fifth Avenue house and was known for his trotting horses, his diamond studded walking stick, his appearances as a man about town." In 1899, Lamar claimed one of his most famous victims, 25-year-old John D. Rockefeller, Jr. Working throughGeorge Rogers, secretary to Standard Oil founder John D. Rockefeller, Sr., Lamar convinced the younger Rockefeller to buy stock in U.S. Leather, using money he had borrowed from his father. As Rockefeller Jr. was buying, Lamar was selling, and the younger Rockefeller lost nearly $1 million. On July 9, 1903 when his coachman James McMahon appeared in court to testify against Lamar on an assault charge, McMahon was stabbed and beaten by members of the Eastman Gang as he entered the courthouse and he was unable to testify. His obituary noted two brazen swindle attempts in which he hired two men as "hold up experts" in suits he brought against the U.S. Steel Corporation and the Great Northern Railroad and the Northern Pacific Railroads; his "experts" were exposed as frauds A 1913 profile of him remarked that he appeared to be wealthy at times and broke other times. In 1913 Lamar was under indictment in New York and was charged with impersonating a member of Congress. During 1915, Lamar acted as an agent for Franz von Rintelen, an agent for the German Navy intelligence in New York City. He promoted strikes and work slowdowns in munitions plants by means of the Labor's National Peace Council. From offices at 55 Liberty Street, von Rintelen spent US$500,000, most of which went to Lamar, whose reports of success were exaggerated. For his 1913 impersonating Congressman A. Mitchell Palmer Lamar was sentenced to two years to the Federal Atlanta Prison in May 1916. In October 1916 while serving his Atlanta Prison sentence he was working as a tailor In 1923 after losing an appeal on a conspiracy charge, he fled New York City and was found 8 months later in Mexico and sent to prison again in Jersey for one year for being involved in strikes in munition factories; he was released in 1924. In 1924 his first wife divorced him and retained custody of their daughter Dorothy. On November 22, 1925 in Ridgefield Conn he married a stage and Screen actress Edna Eck aka Edna Fretch; in August 1926 he was served with a subpoena in regard to alleged stock manipulation of Consolidated Distributors ; after Lamars demise-according to his attorney-Lamar had not been in the money since 1929 Lamar died in a New York City Hotel room of heart disease January 13, 1934.
