11.   But investigators do suspect foul play.

12.   But many investigators suspect that the most likely terrorists were Islamic extremists.

13.   Corvette said the investigators suspect that box office employees accepted bribes in exchange for the tickets because the seats were always in the best locations.

14.   Each of the helicopters that crashed had gears made with a metal that investigators suspect may contain a potentially deadly flaw.

15.   European and American investigators suspect that Atta was the overall commander of the terrorist attacks and was aboard the first plane to hit the World Trade Center.

16.   Federal investigators had suspected as much.

17.   Federal investigators suspect a Vasco gear was responsible for the crash, and Boeing officials acknowledge that a gear did fail.

18.   Federal investigators also suspect that Raissi helped train three of the other hijackers on a flight simulator at the Phoenix school.

19.   Federal investigators suspect the pipeline was damaged by construction equipment.