Carelessness of Noida police

I don’t know what the hell was going on in Noida police’s mind when Aarushi was murdered. Due to careless works done by Noida police, CBI is struggling to find a breakthrough in the case. Noida police after finding the murder spot; they didn’t try to seal that area. They left all the press reporters and people around it and destroyed all evidences. Now CBI is in trouble.