'Parekh should speak out about PM’s involvement in coalgate'

After former coal minister PC Parekh said that PM Manmohan Singh should be the first accused in the scam following CBI's FIR against him and industrialist KM Birla, BJP leader Yashwant Sinha said that Parekh should now speak up the truth about PM's involvement in the case as he must be knowing unknown facts about the same.