But now investigators suspect that the real difference may be age.

Investigators suspect that drugs may have played a part, officials said.

Investigators suspect that the bank account set up in his name was a case of identity theft.

But it was not, as the original investigator had suspected, in revenge for the death of the guard.

Although Neri is the focus of the investigation, investigators suspect he did not act alone.

Investigators suspected a prominent businessman, whose car was seen in the area the night of the murder.

Five men have been charged but investigators suspect that many accomplices are still at large.

But Congressional investigators suspect the figure may be lower, perhaps $5 million to $10 million.

Some investigators suspect there is another reason for Hanoi's reluctance.

Tanzanian investigators suspect he was a central figure in the plot.