premise: One of the four dead might be the suicide bomber, whose body was wrapped up with wire of bombs.
  Agitated lawyers of different district bars boycotted courts in an instant protest against the bomb attacks in Chittagong and Gazipur.
  Lawyers in Dhaka, Chittagong, Gazipur, Sylhet and other districts staged wildcat strike through boycott of courts and brought out protest march in the court compounds.
  On Nov. 14, a JMB suicide squad bombed a court microbus in southern Jhalakati district, killing two senior assistant judges.
  Earlier, the activists of the banned JMB staged serial bombings simultaneously at court and government establishments in 63 district headquarters on Aug. 17, leaving two people dead and hundreds wounded.
   What led to the killing of two senior assistant judges?
hypothesis: an instant protest against the bomb attacks