answer: #Person1# and #Person2# are analyzing culprit of the fire.
documents: #Person1#: In my opinions, someone else has caused the fire of this house.
  #Person2#: Who do you think that has the motive?
  #Person1#: I'm not sure now. In any case, let's first make some careful investigations.
  #Person2#: OK, murder will out!
  #Person1#: Yeah.