I was just thinking of ways that Nanda & Shivum can prove Geeti's innocence & one of them could be the medical check up she had. If she is found to have been drugged, it can be proved that she was in no state to physically attack Jassi. Also that boy who confronted Jassi could be brought in to testify that Geeti was almost unconscious in the car...thus Jassi's death can be ruled as a freak accident.
Any other ideas?