This clip from Genealogy Roadshow focuses on Monica Donley, who has roots in Mexico and lives in Detroit, Michigan, with her children and husband, an amateur genealogist who suspects, but cannot confirm, that Monica has ancestral ties to the 15th century Spanish explorer Juan Ponce de Leon. Using techniques in Spanish genealogy, a professional genealogist successfully shows that Monica is the 15th great granddaughter of Ponce de Leon, demonstrating how to work forwards from a suspected ancestor and backwards from known ancestors to connect family trees.