LONDON (AP) — The chief executive of a British racecourse was among four people found guilty of breaching racing rules at a corruption hearing.

A disciplinary panel of the British Horseracing Authority found Kevin Ackerman, the CEO at Towcester in central England, laid bets against a horse knowing the jockey was not attempting to win.

The jockey, Michael Stainton, and racehorse owner David Greenwood were found guilty on Wednesday of their part in the conspiracy involving the horse Ad Vitam in four races from November 2011 to March 2012. Registered owner Kenneth Mackay was also found guilty.

The BHA says Greenwood wanted Ad Vitam to not win so the horse's official rating would be reduced, allowing it to be more competitive.

The punishment for Ackerman's offense is a ban of between six months and 10 years.