Sachenbacher - Stehle had finished fourth in both the mass start and the mixed relay but was disqualified from both events after testing positive for the banned substance methylhexanamine .
The biathlon portion was marred by German biathlete Evi Sachenbacher - Stehle 's positive doping test .
biathlete     had finished fourth in both the mass start and the mixed relay but was disqualified from both events after testing positive for the banned substance methylhexanamine .
The biathlon portion was marred by German biathlete Evi Sachenbacher - Stehle 's positive doping test .