1.   Beaird said the police investigation centered on a rigger who set up the stunt and the possible charge was involuntary manslaughter.

2.   A federal source said the Houston investigation centers on possible violations of the Hobbs Act.

3.   But sources at the auction houses, who spoke on condition of anonymity, said the investigation centers on the fees.

4.   But they said that the investigation has centered on theories of anti-government groups or individuals motivated by hate.

5.   Its investigation has centered on the dominance Novartis would enjoy in the crop-protection business, where the company would be twice as large as its next competitor.

6.   That investigation centered on whether Lewinsky was conspiring to obstruct justice by lying about her relationship with the president and encouraging Tripp to lie.

7.   The broader investigation centers on whether the company engaged in a systemic effort to increase its federal compensation by misreporting its costs.

8.   The espionage investigation centers on suspicions that China tried to recruit a spy against the United States.

9.   The federal investigation centers on whether each of the fund managers independently decided to avoid buying the Illinois bonds, or whether they agreed to act together.

10.   The Florida investigation centered on alleged widespread churning violations by Prudential salesmen.