THRISSUR: The Crime Branch (CB) has started a probe into a complaint registered against business tycoon Nisham by his brothers and a business partner. Nisham is languishing in jail for the murder of security guard Chandrabose. Nisham’s brothers Abdul Nisar and Abdul Rasaq and his business partner Basheer Ali had submitted a complaint to DGP Loknath Behera citing they were facing death threat. They said Nisham had hired goons and they were facing threat to their life and property.