AFPWarrington, UKThe 96 Liverpool fans who died in the Hillsborough football stadium disaster were unlawfully killed, a jury found Tuesday, blaming police for the worst tragedy in the history of British sport.Following the longest-running inquest in English legal history, jurors concluded that policing decisions at the ill-fated match in 1989 "caused or contributed" to the deaths, and amounted to "gross negligence".Relatives of the victims have fought a 27-year campaign to…