Before leap Ad told Bani that she can return to Mumbai after 5 yrs because BW will then be considered dead.
The same police who was handling the case let Jai take Bnai to Wm without any problem. HE could have arrested her then & there. BUt he kept talking about Mr & Mrs Walia trapped with terrorist & didn't take any action.
Even Pia could have gotten Bnai arested there itself in that mill. Police were around then.
But then how would Ekta creat fake sense of JB reunion (?)