There are no such retests going back 50 years. "The IOC can hold the bottles for up to 10 years, and can thaw the urine for a retest any time during that window

There are no such retests going back 50 years. "The IOC can hold the bottles for up to 10 years, and can thaw the urine for a retest any time during that window." [1] After that window, it's gone. https://www.usatoday.com/story/sports/olympics/2016/05/22/how-it-works-a-look-at-the-retests-of-olympic-drug-samples/84741634/ https://www.usatoday.com/story/sports/olympics/2016/05/22/ho...