I had a gun

In the previous chapter, we read that Grandma asked Kamran about the reason behind his arrest. He first demanded Kashif to leave the room by whispering to Grandma, then when Sana and Kashif had left the room he explained:

Kamran: I was just coming from a friend's gathering when I saw some people in a jewelry shop they were armed, I then looked at them carefully I noticed that I knew some of them so I decided to reason with them taking advantage of my naiveness they tricked me and told that they will not rob the bank again and said that they don't want to spend the rest of his life in prison they want to start their life like a normal and respected citizen... (lies)

Grandma: Then how did you got arrested? and how did you know those robbers?