Where did the IS cap come from?

How did one of the most talked about terrorists carry a cap emblazoned with the IS logo to a Dhaka courtroom in and then proceed it put it on for all to see? How did the person then continue wearing the cap while surrounded by law enforcers? And finally, where did the cap come from?  These burning questions were on the minds of everyone in court and on social media yesterday.  As soon as a Dhaka court finished delivering judgement in the country’s worst ever terrorist attack case, convict Rakibul Islam alias Regan, who was in the dock, wore the cap emblazoned with the emblem of the Islamic State, a global militant outfit.