The court's investigators have already worked in the region for the past two months.

More than 100 investigators from three Federal agencies are working on the case.

Court records show that private and Federal investigators worked together on the case.

"I need to know what your internal investigators were working on."

He might come back to watch the investigators work around his victim.

Investigators and prosecutors have been working on the case for more than two years.

Our investigators are working like mad to try and get in contact with people.

I'm a private investigator, working to locate a man we think might be in the area.

His investigators must work against the will of the Sudanese government.

The following day, investigators were working on the assumption she had been murdered.