The investigation involved a close friend of hers, the officials said.

The investigation involved a team of up to 15 staff who conducted more than 200 interviews.

The investigation does not involve their daughter, now a law student in London.

But they said the investigations began several months ago and involved how the company had received the contracts.

It can help to speed up the work where an investigation involves the results from several different cases.

A more recent investigation, reported in March, involved the spread of tuberculosis.

It is not clear whether the investigation involves foreign car makers.

But that investigation involved thousands of men giving blood.

The Canadian investigation and recovery effort now involves more than 1,500 individuals, officials said.

If we want to be effective, more investigations involving a European dimension are needed.