United States investigators said on Thursday they had found the bolt-action rifle they believed was used to kill influential conservative activist Charlie Kirk as he gave a talk at a university in Utah, but were still searching for the shooter. Kirk, an influential ally of President Donald Trump, was fatally shot on Wednesday while speaking at Utah University, sparking a manhunt for a lone sniper who the governor said had carried out a political assassination. Authorities said they still had no suspect in custody as of Wednesday night, some eight hours after the midday shooting at Utah Valley University campus in Orem, Utah, during an event attended by 3,000 people. Cellphone video clips of the killing posted online showed Kirk addressing a large outdoor crowd on the campus, about 64 kilometres south of Salt Lake City, around 12:20pm MT (18:20 GMT or 23:20 PKT), when a gunshot rang out. Kirk, a staunch defender of gun rights, was answering an audience question about mass shootings when the bullet struck his n...