From the article...
According to various media, the Prime Minister “remembers being in” Creston for the festival, “but doesn’t think he had any negative interactions there.” In other words, he cannot confirm nor deny.
In the original editorial piece about the groping incident, which was published 18 years ago in the Creston Valley Advance local newspaper, Trudeau reportedly apologized with, “I'm sorry. If I had known you were reporting for a national paper, I never would have been so forward.”
If the woman in question decides to come forward, this could become radioactive.