Shambhavi was detained at Parliament street police station for protesting. She live tweeted and called for help. Many turned up, and many (read Congress chamchas) formed a disinformation campaign on Twitter portrayed her as a liar.
A must read article by independent journo Shivam Vij:
http://kafila.org/2012/12/26/how-delhi-police-assaulted-my-daughter-on-25-december-usha-saxena/