DENVER (AP) — Young gymnasts and their parents started raising red flags about a coach as far back as 2017 — the same year a watchdog agency was created in the wake of the Larry Nassar sexual-abuse scandal that nearly eviscerated USA Gymnastics and damaged the country's entire Olympic movement.

But it took until 2022 for Sean Gardner to face any sanction from the U.S. Center for SafeSport, the independent agency created by Congress to investigate misconduct in Olympic sports. And it wasn't until this year that details emerged about the coach, whose arrest on child pornography charges in August was a turning point in a case one person involved called “Nassar 2.0."

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