Sealed criminal indictments have been used in other white-collar cases, both for strategic and investigative purposes.

Police officers with search warrants could use the technology for investigative purposes, as well, he suggested.

It was something, she supposed, she'd have to find out - for investigative purposes only.

The cause of death was determined, but has been withheld for investigative purposes in fear or jeopardizing the investigation.

"There was nothing there that we could use for investigative purposes to open a case," he said.

"If there is any legitimate investigative purpose, yes."

It was sent to Washington with a corresponding list of photographs, indicating its possible use for investigative purposes.

There'll be no living until we've completed the investigative purpose of this trip.

"This office has issued a lawful subpoena for legitimate investigative purposes," he said.

Hearings may be for legislative, oversight, or investigative purposes.