Reason for Martyrdom

It  is  a  decided  matter  that  the  martyrdom  of  Imam Mohammad Taqi (a.s) took  place  because  of  poisoning  and  it  is  confirmed  that  he  was poisoned  by  Motasim.  Now  some  people  have  created  doubts in  this  matter:  whether  this  job  was  entrusted  to  Ummul  Fadhl[wife of Imam(a.s) and daughter of Mamoon] or  some  other  minister, …