Now, investigators wonder how Mr. Doviak did well at Prudential in contests and so poorly on his own.

But some investigators and members of Congress still wonder whether there were other such secret operations.

Some independent investigators also wondered why the gun had not been found sooner.

Meanwhile, investigators wondered where the rest of the body was.

Over the years some family members and military investigators have even wondered whether he was working as a spy.

The investigators wondered whether the one-third of clinics that did respond were "more conscientiously organised" than the rest.

At the same time, New York's private investigators wondered why Ms. Pirro, the former district attorney of Westchester County, would risk her reputation by even considering electronic eavesdropping.

He had been trying to learn how to fly and investigators were wondering now whether he might be connected to the terrorist attacks on New York and Washington.

Some investigators wonder whether he might be the missing 20th hijacker.

Some investigators wondered if the bomb was an intentional dud, since if it had exploded the note would have been obliterated.