"I'm concerned about four or five very, very sensitive investigations."

Keeping it open, he went on, might compromise an "extremely sensitive" investigation.

Such restrictions are standard after particularly sensitive Congressional investigations, largely to protect personal privacy.

The police and Federal officials would release only the barest details about the cases, saying they were among the most sensitive investigations in the city.

He had pursued sensitive investigations in dozens of them across the country during his career.

I'm in the middle of an extremely sensitive investigation, one the feds would like to snatch out from under me.

This was a particularly sensitive investigation, and the media were becoming restive.

The department has also been criticized by elected officials for dragging its feet on sensitive investigations.

I'm in the middle of an extremely sensitive investigation.