21.   Initially, the Air Force closed its investigation after saying it could not determine the cause of the crash.

22.   It was why the league did not suspend the player for pleading guilty to obstruction of justice in the Atlanta murder investigation after Super Bowl XXXIV in January.

23.   Micron announced its request for the expanded investigation after the market closed.

24.   Nvidia disclosed the investigation after the close of regular stock trading.

25.   Nonetheless, the corporation launched its own investigation after learning the list-sharing was not an isolated incident as it first seemed.

26.   Of the seven, one resigned during the investigation after failing a drug test.

27.   Sherman, a television news producer, began his own investigation after discussing doubts with his mother.

28.   Specter has not made up his mind on whether to pursue an investigation after the trial, his spokesman John Ullyot said.

29.   State officials began their investigation after the Los Angeles Daily News reported in September that local GTE customers were complaining about improper billing by FTC.

30.   The agency began its investigation after receiving complaints from a group of current and former Parks Department employees, all of whom are black or Hispanic.