3:21newsApril 5, 2018New details on activities of alleged YouTube shooter Nasim Aghdam practiced shooting at a gun range not long before the attack at YouTube headquarters in California, investigators said.Up Next in newsAuthorities respond to active shooter at YouTube HQApril 3, 2018Relatives of YouTube shooting suspect say they warned policeApril 4, 2018YouTube shooting suspect was 'upset' with company's policies: PoliceApril 4, 2018