Finally, convicts in Nirbhaya gangrape murder case are hanged to death in Tihar jail. After 7 years, justice has been served to Nirbhaya. For seven years, Asha Devi, mother of Nirbhaya, struggled for justice, and finally justice has been served. But, what happened seven years ago? How convicts were arrested? Investigating Officer ACP Rajendra Singh answers all these questions. Watch the video.