As shekhar told that old durga was different...now dayal would not be that foolish to not see such a big change in durga..
And durga can call that doctor from USA and ask him to explain the matter of her being changed by dayal from nitya to durga...plus durga was not there at the murder place but was having dinnner with dev...mohanty becomes witness or dev of this fact...a look alike is always not an imposter...and sakshi knows that..she just wants durga behind the bars but she does not know what is happening behind her back..plus if asked might be durga wont accept this wealth of late dayal...
Lot of witnesses and evidences are there to punish the trio
Divya
Mohanty
Dev
Aakash
Durga
The famous murder tape
The famous rape clip
Brief end
Shaurya jailed
Rajnath jailed
Sakshi Pagal
Dev, Durga, Suchitra live happily ever after
Mukherjee suspended and then jailed