Jayg, Emil Denemark was a well known Bohemian car dealer in Lawndale beginnng in 1915. Here is a page from a postcard booklet from my collection put out in 1925 by Bohemian photographer E.F. Macha advertising the neighborhoods of Czechoslovak Chicago and vicinity.
Emil Denemark lived at 2449 S. Pulaski in what is now Little Village and eventually had a beautiful home built in Oak Park at 600 Clinton Ave., he later lived in Riverside, IL. I don't buy the Capone connection in the first entry though. It seems as if everybody back in the 1920s claimed some connection to Capone. What that first entry says is Mrs. Emil Denemark was the mother-in-law to Al Capone??? That means Mae Capone is the daughter of the Denemark's???? I don't think so..... Mae Capone, nee Coughlin, was a native of New York and eventually came to Chicago to be with Al.
HOWEVER, Mr. Denemark seemed to be in a heap of trouble back in the 1920s. His house and business were bombed, and his driver murdered, and he was robbed several times. Who knows, he may have been into bookies for a lot of coin, afterall he liked the ponies.
He did have the radio station in his showroom and hosted many Czech language programs.
Emil Denemark died at age 68 in May 1963 and was waked at Svec Funeral Home in Berwyn. He is buried at Bohemian National Cemetary. At the time of his death he was hailed as a "pioneer of thoroughbred horse racing in Illinois."