In Primal Fear and Deewangi, the killer actually doesnt have MPD but pretends to have one so he will be excused on the grounds of insanity. After the hero/lawyer helps him win the case, then the killer reveals that the whole MPD was just an act...he just pretended to have multiple personality disorder so the law cannot hang him for cold blooded murder.
I hope they will show some twist at the end in Adaalat...this killer (Eijaz after a long time...sighh😆)
wont be able to fool KD completely and KD will figure out hes a cold blooded killer who just invented a double personality to fool everyone.