Dominican sprinter Luguelin Santos has been stripped of his World Junior Championships gold medal from 2012 and handed a three-year ban by the Athletics Integrity Unit (AIU) for age-manipulation violations. The AIU revealed this decision on Friday, uncovering Santos's admission to competing with a falsified date of birth during the 2012 World Junior Championships in Barcelona.

 Luguelin Santos, now 31 years old, had clinched the 400-metre gold at the 2012 World Junior Championships when he was just 18. However, the AIU's investigation exposed that Santos had utilized a passport with a manipulated birthdate, claiming to be born on November 12, 1993, when, in reality, his birthdate is November 12, 1992. Consequently, Santos was ineligible to participate in the 2012 World Juniors, as per the competition rules requiring junior athletes to be either 18 or 19 years old on December 31 of the competition year.

 The AIU, in a statement, clarified the gravity of the violation, stating, "Thus, he was ineligible to participate in the World Juniors 2012." The age-manipulation incident tarnished Santos's victory at the championship, leading to the unprecedented decision to strip him of the gold medal.

Santos, a two-time Youth Olympic champion, had furthered his career by claiming a silver medal in the 400m event at the 2012 London Olympics. However, Brett Clothier, Head of the AIU, emphasized that unlike doping violations, age-manipulation sanctions do not warrant the annulment of Olympic results. Clothier explained, "There is no basis on which to annul his Olympic result as that was not an age-group event and no violation was committed there."