S1·E196 The Missing Man - Part 2

Despite his injuries, the man wakes up- but upon awakening, he insists he injured himself by falling off the flyover by mistake, despite evidence from his injuries that he was attacked. He also seems desperate to stop any investigation of his case. Who is this man? Who attacked him, and why? Why does he have this much money with him? And why does he not want his case to be investigated?