Before dying the writer managed to say that clue is in the startings. KD combined the 1st words of few first chapters and it formed that Singhal Gave money to goverment. The writer was too intelligent as he managed to hide the clue this way. KD found out that Singhal gave 42 Crores to the judge and the whole sequence of plane crash was a plan. They had decided to kill KD and Pranali too.
comment:
p_commentcount