Without any such red flags from the banks, federal financial investigators never scrutinized any of the accounts before Sept. 11, officials said.

Oyster Bay Supervisor Joseph Colby has decided not to seek re-election, as county and Federal investigators scrutinize his administration.

Congressional investigators are also scrutinizing numerous other grants of clemency among the 176 pardons and commutations issued by Mr. Clinton on Jan. 20, his final day in office.

German investigators are scrutinizing the activities of a Polish émigré to Germany named Christian Ganczarski, a convert to Islam who lives in the small German town of Haan.

In addition, the sources said, investigators have been scrutinizing transactions between Mr. Boesky's firm and Jamie Securities, another firm that specializes in investing in takeover stocks.

Mr. Ferguson, who oversaw General Re from the late 1980's to 2001, a period when the company was involved in a series of questionable transactions that investigators on three continents are now scrutinizing, also has not been charged with any wrongdoing.

This caused investigators to further scrutinize the tail of the aircraft.

As part of that, investigators will scrutinize a recent decision by the agency to drop claims that the Chevron Corporation had systematically underpaid the government for natural gas by inflating its costs for processing.

By November of last year, as investigators scrutinized Mr. Jackont's computer woes more closely, his stepdaughter, Natalya Wieseltier, stepped forward with a key bit of evidence.

Instead, investigators have closely scrutinized the way Mr. Norman handled campaign funds, including the $5,000 check that was written to his re-election committee by his political club, the Thurgood Marshall Club.