The FBI barged through the gates, demanding to search the plant for evidence.联邦调查人员冲过几道大门，要求在工厂内搜寻证据。Federal investigators combed through the crash site.联邦调查员仔细搜查了撞车现场。The business has recently been put under the microscope by federal investigators.这家公司最近正接受联邦调查员的仔细审查。