The investigations on the ground and in the air produce several leads.

Initial investigations have produced no personal motive for this murder.

"An investigation like this, if successful, produces a ripple effect - one person leads to another."

The investigation carried out by the Montenegrin police never produced a suspect.

If the investigation produces evidence of a widespread problem, a recall could be ordered.

The investigations into financial reinsurance have already produced some striking results.

Congress is allowed to investigate almost all issues, most Congressional investigations produce a report.

But senior counterterrorism officials said their investigation had produced a starkly different picture.

The investigations of the other planets had produced no results that would cause any apprehensions.

We must wait until the investigation produces specific results.