John Frush Knox (19071997) served as secretary and law clerk to United States Supreme Court Justice James Clark McReynolds from 1936 to 1937. After working at various law firms, he took over the family mail-order business and then worked as an insurance adjuster. He is chiefly known for his memoir of his year spent working for Justice McReynolds.

Based on that paragraph can we conclude that this sentence is true?
John Frush Knox studied law
Yes