Zahur H Zaidi, the inspector general of southern Himachal Pradesh, Deputy Superintendent of Police Manoj Joshi and six other policemen were arrested by the Central Bureau of Investigation, which took over the case on July 22 following public anger.
The body of the 16-year-old was found on July 6. Six men were arrested in the case. Suraj Singh, a labourer from Nepal who died in police custody on July 21, was one of them.
Police say Suraj Singh was killed by another man, Rajinder Singh, who is the prime accused in the case. He allegedly killed Suraj Singh by smashing his head on the floor of the police station.
According to the police, Rajinder Singh had offered a lift to the teen while she was walking home from school on July 4. He allegedly took her to an apple orchard where she was raped. Her body was found two days later in the woods nearby in Kotkhai.
Not many people believe the police version. The National Commission for Scheduled Castes member Swaraj Vidwan who recently met the family of the teenager claimed there were "gaps" in the police probe.
The Himachal Pradesh High Court had finally stepped in and ordered the CBI to take over the probe.