The broad investigation has used aggressive tactics like wiretaps and focused largely on the relationship between hedge funds and expert consultants, resulting in multiple criminal cases and guilty pleas in recent months.

FORBES: Hedge Fund Employees Charged With Insider Trading

An influenza expert, Salk leveraged his relationship with D.

FORBES: Click to zoom/ back to slide show

Until "Fast and Furious, " Americans knew "very little" about the flow of U.S. firearms to cartels, said Josiah Heyman, an anthropology professor at the University of Texas at El Paso and an expert on violence in Mexico and its relationship to U.S. policy.

CNN: On the border: Guns, drugs -- and a betrayal of trust

The relationship between Gilman and Martoma was facilitated by an expert network firm, an industry that has been at the heart of a number of insider trading cases brought by Preet Bharara in recent years, cases that have put the likes of Galleon Group founder Raj Rajaratnam behind bars.

FORBES: 'Most Lucrative Insider Trading Scheme Ever': Trader With SAC Ties Charged With Illicit $276 Million Score

When it comes to covering the moves of Vanguard, which has long held somewhat of a Teflon relationship with financial media including Forbes, I know of no better expert.

FORBES: Should Vanguard's Directors Be Sued For Mismanaging U.S. Growth Fund?

"From the moment he arrived in Portugal, Bela Guttman's relationship with Benfica was destined to be complex, " says Portuguese football expert Ben Shave.

CNN: Benfica and 'the curse of Bela Guttmann'

The prime minister acknowledged the relationship between politics and the media needed to be looked at again in the wake of the death of weapons expert Dr David Kelly.

BBC: At-a-glance: Blair news conference