On February 9, Imran was produced before ATC which made a decision to hold the trial in jail owing to security issues. He has been sentenced to life imprisonment along with a fine of Rs 1 million for an unnatural act with a minor.
On Monday, the anti-terrorism court had indicted Ali and started regular proceedings after he refused to accept the charges levelled against him by the police. "The convict was then told that anything he says will be used against him in court, after which he confessed".
Nonetheless, the prosecution chose to submit all its evidence to court so that the case remained airtight.
Ali will have 15 days to file an appeal.
The verdict was announced by ATC judge Sajjad Ahmad in the presence of Zainab's father Haji Muhammad Amin at Kot Lakhpat Jail amid tight security arrangements.
Three of the counts of death penalty were for kidnapping, rape and murder, while the fourth was for terrorist activity.
As per the orders of Chief Justice of Pakistan Saqib Nisar, Punjab Prosecutor General Ahtesham Qadar personally attended all the hearings of the case.
Ali was arrested in January, two weeks after the body of 7-year-old Zainab Ansari was found in a garbage dump in Kasur, about 340 kilometers (210 miles) south of the Pakistani capital, Islamabad.
Her case was the twelfth such incident to occur within a 10-kilometre radius in the city over a 12-month period.
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The city's mayor told the Rossiya 24 TV channel a team of psychologists was working at the airport to comfort people. The probe into that crash is still ongoing, but officials indicated that a pilot error appeared to be the reason.
Hundreds of local residents protested after Zainab's body was discovered, and two were killed when police fired shots to break up the crowd. On January 23, the forensic examination confirmed it was Imran who was arrested on the same day.
State prosecutor Ehtesham Qadir said Imran Ali, who had pleaded guilty during the five-day trial, was in the courtroom for the verdict. A total of 56 witnesses were named in the case.
Zainab Ansari was raped and murdered.
Qadir said Imran received four death sentences from the court.
In is the first in the judicial history of the country that a court has completed trial in seven days.
One million rupees of the fine would be given in compensation to the victim's family, public prosecutor Abdul Rauf Wattoo said. Police told that they had matched the DNA from eight girls' bodies, including the killer Imran, 24.
The horror of Zainab's killing in January was brought home for Pakistanis by a photo of her that went viral on social media, showing the smiling girl in her favourite bright pink coat, with a pink barrette holding back her hair.
[Imran Ali] Not only confessed rape and murder of [ girl] Zainab, but of eight more girls.