Olympic medal winning wrestler Yogeshwar Dutt today joined the chorus of support for Narsingh Yadav, caught in a dope scandal, saying that the matter should be investigated throughly.Narsingh's dope test came positive barely 10 days before the start of the Olympics and he cried foul, saying it was a conspiracy against him.Wrestling Federation of India (WFI) also strongly put its weight behind the 26-year-old grappler, insisting that it was a clear case of sabotage.WFI also urged with the Sports Ministry and top officials in the government to help Narsingh's case. Narsingh will get a final chance to prove his innocence when he faces the NADA disciplinary committee tomorrow. The NADA DG Agarwal said the results of Narsingh's initial tests had returned clean. He said, the 2nd June result was alright, it was the 25th June sample which came out positive. Even in that, the blood sample was fine but his urine sample tested positive, Agarwal said. Sports Minister Vijay Goel reiterated that due process would be followed in deciding Narsingh's fate.