Qari Hussain, the chief instructor of suicide bombers (Ustad-e-Fidayeen)
If the killing of Hakimullah Mehsud in a US drone attack is confirmed, it could set off a new power struggle within the Tehrik-eTaliban Pakistan, which may conclude with the naming of Qari Hussain, the chief instructor of suicide bombers, as the new Pak-Taliban chief, according to a report published in the New York Times. According to the paper, two candidates are likely to take over from him: Wali ur-Rehman, known as the chief TTP military strategist, and Qari Hussain, the chief instructor on suicide bombers. Hakimullah was chosen by al-Qaeda to succeed Baitullah Mehsud because he was considered most allied to it.
Here is an informative article by Rahimullah Yusufzai on Qari Hussain: