How did they trick you

In the previous chapter, we read that Kashif freed Kamran from the police station after paying a heavy bribe then he let him home in his car in dead silence. Grandma and Sana were waiting for them when they reached the house as Kashif had explained the situation. As Kamran got out of the car Grandma ran out of the house and kissed Kamran on his forehead, then they let him in and started asking questions:

Grandma: What happened dear? How did you get caught?

Kashif: I can't understand the situation. The police officer was sure that Kamran is a member of some most wanted gang.

Kamran glared at Kashif. Sana added:

Sana: I am sure this is some big misunderstanding. Kamran must have a reasonable explanation for this, right Kamran?

Kamran stood up and whispered something in Grandma's ears, then she signaled Kashif to leave the room, and he awkwardly left quietly. Then Grandma said:

Grandma: Now! Tell me about that