1.   But FBI agent Rick Smith said the probe had successfully followed the cocaine trail from distributors to higher-level suppliers.

2.   The Labor Department probe follows a complaint by the Greenlining Institute, a public advocacy group based in San Francisco.

3.   The second probe followed a second gang based in South Central Los Angeles.

4.   The probe followed an academic study and a series of class-action lawsuits that alleged bid-rigging on the Nasdaq exchange.

5.   The probe follows a study in Britain showing that nine brands of artificial baby milk contain dangerous levels of chemical called phthalates, which harmed fertility in laboratory rats.

6.   The probe follows several other high-profile cases involving allegations of sexual misconduct in the Army in recent years.

7.   The probe follows a similar investigation into compact disk prices launched in February.

8.   The probe followed an embarrassing investigation by New York State Attorney General Eliot Spitzer into Wall Street titan Merrill Lynch.

9.   The probe followed the discovery in a Texas facility that a strain of the Ebola virus was found in two primates imported from a Philippine farm.

10.   Mahathir said the probe followed complaints from party members over the impartiality of the existing disciplinary committee.