She Accused a Rowing Legend of Abuse. Now He Is Being Erased From the Sport.

A 16-month investigation made public on Tuesday determined that child sexual abuse accusations against Ted Nash, a two-time Olympic medalist and nine-time Olympic coach for the United States who had mythic status in his sport over decades, were credible and that his main accuser had no motive to lie about the abuse.

The 154-page report by the law firm Shearman & Sterling, which U.S. Rowing, the sport’s governing body in the United States, asked to examine claims against Mr. Nash, found that Jennifer Fox, now 64 and a filmmaker who lives in Manhattan, was believable when she said that Mr. Nash had groomed her for a sexual relationship and sexually assaulted her multiple times more than 50 years ago. She was 13 then and he was her 40-year-old running coach.

The abuse, which lasted about a year, ended in 1973, said Ms. Fox, whose 2018 film “The Tale” depicted her memories of the abuse but did not name Mr. Nash. He died at 88 in 2021.

Jan Nash, his widow, did not immediately respond to voice messages and texts seeking comment. Last year, she told The New York Times that she was shocked and saddened by the accusations and said that “it’s just not fair” for Ms. Fox to name Ted now that he can’t defend himself.

The report specifically stated that the law firm was not tasked with finding evidence that met any legal standard of proof for the abuse. But after the firm interviewed approximately 47 witnesses who interacted with Mr. Nash or Ms. Fox, it said its inquiry corroborated many of her allegations against him. Also, the investigation did not find evidence that “expressly refutes” her accusations or a motive for her to lie about the abuse, the report said.

The accusations against Mr. Nash, who had served as a father figure to many of his athletes over the years, both on and off the water, were made public in 2023 when Ms. Fox told her story to The New York Times.