Over a week after Kunda DSP Zia-ul-Haq was killed in full public view, the CBI team investigating the case has made little headway as no witness has come forward to testify in the case. Meanwhile, mafia don-turned-politican Raghuraj Pratap Singh, alias Raja Bhaiya, who is suspected to be behind the murder, is yet to even be questioned by the CBI sleuths.