The second sample from all four - Bernardo Alves (Brazil) - Chupa Chup; Christian Ahlmann (Germany) - Coster; Denis Lynch (Ireland) - Latinus; and Tony Andre Hansen (Norway) - Camiro - revealed the presence of the banned substance capsaicin, thus confirming the initial positive findings from the A samples.
The horse of US dressage rider Courtney King has also returned a positive second sample, to the class A prohibited substance Felbinac.
The process will now follow the Accelerated Medication Control Procedure during and after the 2008 Olympic Games which is part of the FEI Regulations for Equestrian events at the 2008 Games (Annex G).
Evidence and written submissions have been requested from each rider, and a three-member panel of the FEI Tribunal has been appointed. Hearings will be held on 5, 6 and 7th September in Lausanne, Switzerland.
It is up to each Person Responsible whether or not they wish to exercise or waive their right to be heard. The panel will then, in light of all the evidence received, take a decision as to the applicable sanction if any.
An update will be provided by the FEI following the hearings and final decisions will be announced before the end of the first week in October, provided the hearings can be held as scheduled.
Horse Sport Ireland last night confirmed that it had been informed by Denis Lynch that he would be taking up his right to a hearing and that he intended to make himself available on any of the dates proposed by the FEI.
The competition results will be amended as indicated in the Tribunal's final decision.