The joint investigation team (JIT) head Muhammad Idrees submitted report in the court.
He added that all incidents have taken place within the jurisdiction of three police stations, with the first two incidents having taken place in the remit of the Saddar Division police station.
In the new footage, the suspect can be seen walking around the home of Zainab's maternal aunt on January 4, the day Zainab went missing while heading toward her aunt's home.
Expressing dissatisfaction over progress in the probe into the rape-murder of the minor girl, a member of the bench remarked the investigators had zeroed in on just one angle of the case.
Several similar incidents had taken place in the same city, what police had done so far to arrest culprits, the chief justice asked.
The court observed that had the police been serious since 2015, so many cases would not have occurred.
Additional Inspector General of Punjab police Abubakar Khuda Bakhsh informed that over 1,000 suspects had so far been interrogated and DNA tests of around 400 people were carried out, but their results could not match that of the culprit.
The JIT head told the judges that there was some information about the case which he couldn't tell in the courtroom, prompting the bench to conduct the hearing in camera.
Parents of Zainab and other eight victims were also present in the courtroom and demanded justice. There have been 12 incidents of rape and murder of children in city of Kasur within two months period while police failed to arrest rapist killer.
No headway has been made in the case since the girl's body was found, despite the Counter-Terrorism Department, Intelligence Bureau, Special Branch and Punjab Forensic Science Agency being tasked with investigating the case.
Chief Justice Nisar had taken a suo motu notice of the case on January 10.
The SC judges also remarked that the police was relying on DNA tests alone when they could use other resources to apprehend the suspect.
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