In Shehla Masood murder case, the Central Bureau of Investigtion,CBI today conducted polygraph test on a BJP MLA from Madhya Pradesh, Dhruv Narayan Singh. He was subjected by CBI to a lie-detection test in New Delhi in connection with the murder of RTI activist Shehla Masood, as he professed innocence.Emerging out of the laboratory, Singh told reporters that allegations levelled against him by architect Zahida Parvez, an accused in the case, are baseless and that he is completely innocent.