How a Reporter Uncovered Widespread Russian Meddling — In the Olympics -- ProPublica:The Breakthrough

In the spring of 2016, a Russian government chemist named Grigory Rodchenkov sat across from Rebecca Ruiz of The New York Times and gave her the kind of scoop journalists dream of. He told Ruiz and her colleague Michael Schwirtz how he helped orchestrate the covert distribution of steroids to dozens of the country's top athletes. Russia went on to win 33 Olympic medals at the 2014 Winter Games in Sochi — more than any other country. ....
https://www.propublica.org/podcast/breakthrough-reporter-uncovered-widespread-russian-meddling-in-the-olympics#135263