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.