He said the investigation had been going on for more than a year.

The investigation has been going on for more than a year, government officials said.

He had to go to the office and see how the investigation was going.

The investigation has been going on for about seven months.

We will of course keep the investigation going at this end.

But there doesn't seem to be any sort of investigation going on.

At this point, I had no idea where my investigation was going.

"You thought it would be better if my investigation went no further."

Still, it is not clear how far the investigation will go.

"They'd never let you near it with all the investigation going on."