The identity of the assailant whom Nusrat had named 'Champa' on her deathbed has now been confirmed as Popi, said Feni PBI's Additional Special Police Superintendent Moniruzzaman.
"At least four people clad in burqa carried out the attack that day. It's certain that one of them was a woman," PBI chief Banaj Kumar Mazumder told a media briefing two days ago.
On Monday, he told bdnews24.com, "Although we initially found four names who were present at the time of the attack, the investigation confirmed that there were actually five people on the rooftop. Two of the five were women."
Nusrat's brother Mahmudul Hassan Noman had started a case against eight suspects and four other unidentified assailants clad in burqa.
Nusrat, while receiving treatment in a critically burnt state, had said that a few burqa-clad people had poured kerosene on her body before setting her afire. She could not recognise her assailants as their faces were covered. But she heard one of the assailants being referred to as Champa.
"Despite arresting Popi as a suspect in the case, there remained doubts as to whether her name was Shampa or not," said Moniruzzaman.
"But the probe revealed that Shampa was in fact Popi. The assailants as part of their ploy referred to her as Shampa which Nusrat mentioned in her statement."
Following the attack on Nusrat, police arrested Popi as a suspect on Apr 9 and held her in custody for questioning.
According to Nusrat, when she arrived for the exam, a burqa-clad woman tricked her into going to the madrasa's rooftop by saying that her friend Nishat was being physically assaulted there.