"The way the investigation in the rape and murder case has unfolded from the beginning clearly highlights criminal negligence and police's callousness," a joint statement by the NGOs said.
"Violence faced by women and girls in India has led to stronger constitutional provisions like an even stronger anti-rape law that was legislated post Nirbhaya's case in 2012. But it seems like these laws have an ill fate if the factor of caste further comes into play and in remote parts of the country," it said.