Michele Ferrari, Eufemiano Fuentes or Richard Freeman are some of the most famous doping doctors in history who treated cyclists such as Lance Armstrong, Tyler Hamilton or Michael Rogers. However, a much more dangerous doctor has been working since 1972 doping cyclists of all kinds, from Mathieu van der Poel's grandfather to Laurent Fignon, Frankie Vandenbroucke or Richard Virenque through cyclists and athletes of the last 10 years.