A leading sports administrator said "everyone was at it" when he was warned about abuse of the Para-sport classification system, MPs were told.
The revelation is in written evidence submitted to Tuesday's parliamentary committee hearing by Charlie Bethel, the former chief executive of British Wheelchair Basketball.
Bethel warned the chief executive of "a very large national governing body" that he had been made aware of "inappropriate behaviour" in the classification of a Paralympic athlete.
"I was told - after being told I knew nothing about classification - that everyone was at it,'" Bethel wrote.
Baroness Grey-Thompson's husband played an "unethical" role in the reclassification of one of her British rivals, claims a written statement to MPs.
Ex-UK Athletics official Peter Eriksson alleges British wheelchair racer Anne Wafula Strike was unfairly moved from the T53 category to a more able-bodied category in 2006.