The company was already the subject of a 2003 investigation.

That needs to be the subject of a significant investigation.

The police say the matter remains the subject of an investigation.

Perhaps he should be the next subject of an official investigation.

As a result, he was the subject of a criminal investigation into the matter.

At present, the Director is the subject of a criminal investigation.

They are now the subject of a federal criminal investigation.

The land deal is now the subject of a court battle and a federal investigation.

This matter is the subject of a separate investigation at present.

These are now the subject of a federal investigation and a civil rights lawsuit.