The United States is sending military experts, criminal investigators and hostage negotiators to help find the girls.

美国派出了军事专家，刑事侦察员和人质谈判专家帮助寻找被绑女孩。

And that's what frustrates criminal investigators so often, because we're following the money trail.

这就是经常让刑事调查人员感到沮丧的原因，因为我们正在追踪资金踪迹。

I joined the United States Secret Service just prior to 911, I was assigned to the New York Field Office as a criminal investigator.

就在 911 之前，我加入了美国特勤局，被分配到纽约外勤办公室担任刑事调查员。

Earlier a lower court ruled that Facebook, which owns the service, had refused to cooperate with repeated requests to hand over information to criminal investigators.

早些时候，某地方法院称，推出WhatsApp服务的脸书多次拒绝配合向办案人员提供信息。

Right now, a lower court ruling forbids federal criminal investigators from using any of the classified materials that recovered until an independent special master reviews it for privilege.

目前，下级法院发布了一项裁决，禁止联邦刑事调查人员在独立特别专员对找回的机密材料进行特权审查之前使用这些材料。