Providing the protection she would need if one of his past investigations ever managed to come back and haunt him as it was now.

They said cooperation on past investigations could not be assumed here.

All indications are that the I.O.C. is going to do thorough investigations, past and present.

His conclusion was that "past investigations have left airplanes as the principal working hypothesis.

Some past investigations by independent counsels could have been handled that way without diminishing public confidence.

Another team of detectives is poring over records and reports of past investigations.

Notably, the commission suggested that greater pressure on reporters might have been the missing ingredient in past investigations.

The department's past investigations into the assets of such companies has shown there is often a lot less there than meets the eye.

It's nothing I want to do, Plum, but it is my duty to go when it concerns a past investigation of mine.

The disclosure of the tape recordings recalls similar events that provided critical evidence in past investigations of government scandals.