 Parker 's murder sparked what became one of the biggest police inquiries in the history of Peterborough . During the weekend following the attack , twelve suspects of Pakistani descent were arrested on suspicion of murder . Members of the local community posted a £ 1 @,@ 000 reward for information leading to the arrest of the killers , later increasing to £ 1 @,@ 500 . A number of those arrested were recorded chanting " Taliban , Osama bin Laden " in their cells and while being transported in the police van , which they also vandalised . Detective Chief Inspector Dick Harrison , who was overseeing the case , praised the city 's Muslim community for their involvement in capturing the murderers . 
