Two large jacket buttons helped law enforcement agencies track down the suspected killer of seven-year-old Zainab Ansari in Kasur, a media report said.
The jacket was similar to the one the 23-year-old serial child rapist, Imran Ali, was seen wearing in CCTV footages.
The key evidence was found when investigators raided the suspect’s home after his DNA matched with Zainab’s rapist, an official associated with the investigation told BBC Urdu.
The officer shared the details of how the police went through the investigation process with them.
The Pakistan Forensic Science Agency collected DNA samples of all 1110 suspects and compared each with that of Zainab’s rapist. It was during this tedious process that Imran Ali’s DNA was found to a perfect match with that of Zainab’s rapist.
According to the report, police were later able to arrest the suspect with the assistance of his mother.