Her body was later found for days later and police deduced she had been strangled to death.
There were torture marks on her face and Zainab's tongue was crushed between her teeth, she said.
The girl's father, who was away in Saudi Arabia to perform Umrah when the incident happened, slammed the police for its callous attitude, prompting the administration to rope in officials from the military and ISI to trace the killers.
Opening her segment, she said: "Today I am not Kiran Naz, rather I am a mother today and that is why I am sitting with my daughter". The situation worsened when the protesters attempted to storm their way into the office of Deputy Commissioner and collided with police.
Her body was recovered from a heap of trash on Tuesday and sent to the District Headquarters Hospital for an autopsy.
A week ago, the news of the brutal rape and murder of eight-year-old Zainab in Kasur came in as a big shock for the citizens of Pakistan. REUTERS/Akhtar SoomroPeople chant slogans and hold signs to condemn the rape and killing of 7-year-old girl Zainab Ansari in Kasur, during a protest in Peshawar, Pakistan January 11, 2018.
"I want justice! I want justice!"
The eight-year-old's death is just the latest in a string of 12 similar killings in the city of Kasur, in eastern Pakistan, over the past two years.
According to DawnNews, the post-mortem report of the child confirmed suspicions that she was raped before being murdered. When Zainab was missing her, uncle Muhammad Adnan reported an FIR on Jan 4 in Sadar Police Station of Kasur. The inconsolable parents have said that they will not bury their girl until justice is served. Along with them are celebrities, cricketers and even Nobel peace prize victor Malala Yousafzai.
Later her family and local traders staged a protest at what they claimed was a lack of action by the authorities to find the culprit, with shop keepers closing their premises in support.
Another prominent Pakistani politician, Bilawal Bhutto Zardari, son of assassinated prime minister Benazir Bhutto, expressed his sympathies and solidarity with the bereaved family and demanded that Pakistan re-evaluate how it deals with such horrific crimes against children.
The government of the Punjab province has announced a reward of 10 million rupees ($90,000) for any clue leading to the murderer's arrest.