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Shekaru hudu bayan nan, a lokacin da ya sake tsayawa takara, Sherrif ya kawo karshen huldarsa da kungiyar Mohammed Yusuf, inda suka fara takun saka har zuwa watan Yulin shekarar 2009 a lokacin da aka yi babban rikicin Boko Haram na farko aka kashe Mohammed Yusuf a yayin da yake hannun ‘yan sanda. Daga bisani an kashe dubban magoya bayansa a hare-haren da aka yi ta kaiwa kan cibiyoyinsa a jihohi da dama, musamman Borno, Yobe da Bauchi.