There wasn't anything suspicious in the shop. All the tools and items were just normal stuff available in a shop meant to repair mobiles. But, it was to what they were being used that pissed the Inspector.
He noticed how they were tampering with sim cards that would later join the retail market, as if they had just arrived from the factory. They were also making changes to mobile chargers so that they were able to obtain sensitive information from the mobile phone through it.
There were quite a few like this, stuff they used to obtain private information of people that would later be used for blackmailing purposes. Without another word, the Inspector slapped the man once again, this time putting enough force behind the slap to knock the man unconscious.