The girl in Kasur district of Punjab province was abducted last week outside her home. Her body was found in a rubbish dump on Tuesday.
She had gone to a religious tuition centre near her house in Kasur city, some 50 km from Lahore, on January 5 from where a man said to be a 'serial killer' abducted her, police said.
The police has issued a fresh footage of an unidentified man whose involvement they suspect in the case, Dawn News reported.
Police have clarified that the man is only a 'person of interest' as of now.
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Police said the new video will help them make a headway in the case as it is clearer compared to the footage they had available earlier.
Yesterday, police had confirmed that the results of DNA tests carried out in the case indicated the involvement of one person in at least seven similar cases that occurred in the district over the past year.
Punjab police had earlier said a joint investigation team (JIT) has been constituted to probe the case.
The horrific case has triggered public outrage throughout the country with people demanding justice for the child.
The girl's murder was the 12th such incident reported in Kasur district in a year.
Kasur had made headlines in 2015 as well when it was revealed that a gang of pedophiles was busted for running a child sex ring in the city.