The president of Stanford University announced he was stepping down after acknowledging serious issues with his research. The Los Angeles Times reports that the exposé of the president’s work was conducted by a freshman.

Rumors of altered images in some of the research papers published by Stanford University President Marc Tessier-Lavigne had circulated since 2015. But the allegations involving the neuroscientist got little attention beyond the niche scientific forum where they first appeared — until Stanford freshman Theo Baker decided to take a closer look.

Baker, a journalist for the Stanford Daily, published his first story on problems surrounding Tessier-Lavigne’s research in November. His dogged reporting kicked off a chain of events that culminated this week with the president’s announcement that he would step down from his post at the end of August.

Tessier-Lavigne acted Wednesday after an expert scientific panel convened by the university determined that he failed on multiple occasions to correct errors in his published research on Alzheimer’s disease and related topics, and that he managed labs that at times produced sloppy or even manipulated data.

Of course, Baker covered that too.

In February, the 18-year-old from the Washington, D.C., area became the youngest-ever recipient of journalism’s prestigious George Polk Award for his work on the investigation. Journalism runs in the family: Baker is the son of the New York Times’ chief White House correspondent, Peter Baker, and New Yorker columnist Susan B. Glasser.

The story includes an interview with Baker in which he explained how he contacted experts, then resisted university pressures to back down. Any threat was grounds for another story. He carefully sourced everything he wrote about.