"This day marks the funeral of humanity", she said, according to a report in The Indian Express.
Zainab Ansari's body was found in a rubbish dump on Tuesday, several days after she went missing.
Four people have been caught in connection with the previous 11 cases and several suspects are now in police custody, he said, adding that their identities can not yet be revealed.
"Initial autopsy report suggests that the girl was strangulated after rape", Hameed said.
Zainab was kidnapped from Rod Kot when her parents left for Saudi Arabia to perform Umrah.
The police took four suspects into custody. "Because I could see Zainab when I looked at her", she said.
A Pakistani official says a serial killer may have been behind the rape and murder of young girl whose killing sparked deadly clashes between protesters and police. A shutter down strike was observed in Kasur and all the markets and educational institutions remained closed for two days. He also condemned the killing of two protesters due to police firing on the protesters Wednesday. "Two persons who suffered serious bullet injuries during the protest succumbed to their injuries", a rescue official said. Lahore High Court (LHC) Chief Justice Mansoor Ali Shah took notice of the murder and sought report from the Punjab government.
The chief minister of Punjab province, Shahbaz Sharif visited Ansari's parents to assure them that the perpetrators would be apprehended soon, a provincial government spokesman said.
"They had thrown stones on the buildings of the government hospital, police and deputy commissioner's office... security is being deployed and trying to control the situation", he said. Eleven girls have been killed, and one girl survived an attack.
What appears to be the final page in the notebook of Zainab Amin, the 7-year-old girl whose rape and murder has prompted outrage across Pakistan, is a poignant reminder of a life cut tragically short.
Khan, the former wife of Pakistan Tehreek-e-Insaf chief Imran Khan, requested media and political leaders to avoid politicising the tragedy, and instead play their role in creating awareness about the issue.
Test cricketers Shoaib Malik, Mohammad Hafeez and Wahab Riaz said that it was unbelievable that this brutal incident took place in Pakistan.
Speaking on the occasion, Rana Mashood said they were hoping for a breakthrough in the case after arrest of a few suspects.