Kendall Schler was the first woman to cross the finish line at the GO! St. Louis Marathon on April 12.
She got a $1,500 prize, had her picture taken with Olympic gold medalist and star athlete Jackie Joyner-Kersee and qualified for this year's Boston Marathon.
After looking at the results, GO! St. Louis Marathon officials say Schler's bib number didn't appear in the electronic markers during the race, spotters didn't remember seeing her and photographers didn't have pictures of her, reports KDSK (video below).
Officials believe Schler sneaked into the marathon after the last checkpoint, and they say there is no electronic tracking records for Schler during the 2014 marathon when she came in third.
GO! St. Louis Marathon president Nancy Leiberman says Schler claimed to have removed the magnetic tracking strips during both races, which is a violation of race protocol.
Schler lost her place in the Boston Marathon and is banned from GO! St. Louis events, noted the St. Louis Post-Dispatch.
The official winner of the 2015 Go! St. Louis Marathon has been ruled to be Andrea Karl who came in at 2 hours, 54 minutes and 28 seconds.