The brutal rape and murder of six-year-old Zainab Ansari in Pakistan has sparked outrage across the country. Secunder Kermani reports for Newsnight on the investigation into her murder. Pakistani officials say they will investigate allegations police carried out an extrajudicial killing of a man wrongly accused of murdering a child. The allegations uncovered by BBC Newsnight focus on DNA tests suggesting the child victim was killed by the same man suspected of murdering six-year old Zainab Ansari in Kasur. Police officers deny the claims, saying the man was shot resisting arrest. The rape and murder of Zainab sparked outrage and protests across Pakistan.