Casey also noted that although a formal complaint was made upon return from the tour, the "process followed to address the complaint was inadequate and the complaint was left unresolved".
The CRNZ board accepted the findings, and delegates from their 16 member clubs voted to expel Thompson at a meeting last night.
Thompson's lawyer David Fraundorfer confirmed the expulsion to Stuff, and noted Thompson continued to deny the allegations.
"Mr Thompson is saddened that his relationship with CRNZ has ended after his many years of service to the sport. Even so, he does not regret speaking out in relation to the welfare issues the sport faced," Fraundorfer said in a statement.
"He continues to reject the allegations made against him and highlights that he was willing to participate in a process such as an arbitration that would allow him to call witnesses in support, test the substance of the complaints and put forward his case."
The CRNZ board noted that the nature of the conduct, the impact of the conduct on the female athletes, and Thompson's continued denial and lack of remorse were some of the factors in their decision.
Thompson won two gold medals at the 1984 Los Angeles Olympic Games, in the K1 1000m and K4 1000m.