Actually, this is a law in India
Since there's a huge problem with dahej/dowry and in-laws ill treating their bahu's because of money
Women have a 7 year grace period after their marriege.
Which means that any woman can claim that thier in-laws abused them, and the in-laws will instantly be arrested. In the first 7 years, they take the woman's word as proof.
It protects a lot of women.
So Trupti used that to her advantage. Or else, if Vaidehi claims that the family tried to burn her, they will all instantly be put behind bars
Whatt he police did worng was not listen to Vaidehi completely.
All Vaidehi could say was that the oil fell from Ganga and Tulsi's hands, and after that Trupti didn't let her speak. Or else, if Vaidehi would have said it was an accident and they didnt mean to do it, the cop had no reason to arrest them. The cop didn't let Vaidehi complete her statement
Yuks