The agreement would end a three-year investigation into wrongdoing by Boeing employees.

At this point, Wolfe began a three-year investigation of her own.

Still, his denial would seem to indicate that her three-year investigation came to very little.

The latest case was filed in 1994 after a three-year investigation.

Even without an indictment or pleas, the three-year investigation caused a number of changes within the industry.

Everybody reports that the charges come after a three-year, $9 million investigation by a special prosecutor.

The three-year long investigation had cost £1.2 million, chargeable to the charity.

Despite the ground broken by the three-year investigation, the power of the statute to punish companies remains limited.

More than 450 people were charged with Federal and state crimes as a result of that three-year investigation.

The three were arrested last year, after a three-year investigation.