As far as I understood from the statement of a sports medicine expert on tv- the drug will be detectable in his body for months. Drugs are removed from the body as per their half lives. But what will be important is the level- because if he took it only once due to sabotage in the month of June - there will be a permissable limit which won't cause a ban because with sabotage theory accepted - one time ingestion will not be considered to cause any benefit.