Faith and Kelvin Kiptum(London Marathon Champ) will be subjected to the most intense testing by IAAF with officials showing up unannounced at Keringet and Kaptagat. IAAF folk once showed up at John Ngugi's shamba in Ngarua and demanded to draw his blood on the spot, a heated argument ensued and John, a career KDF officer grabbed a 'Nyahunyo' and thrashed them thoroughly.. He was promptly banned for several years.