Called the Office of Market Intelligence, the unit serves as a "point guard" for the agency — harvesting investigative tips, conducting preliminary investigation and passing on cases to enforcement lawyers.
Mr. Roberts was identified through investigative work and tips, the police said.
What do all these investigative tidbits in "The Tipping Point," which grew out of an article Mr. Gladwell wrote for The New Yorker, illustrate?
The Obama administration has supported the same change, which might still let a suspected terrorist buy a gun if authorities had investigative reasons not to tip that person off to their suspicions.
Almost forty years later, in San Francisco, an investigative reporter (Halle Berry), tipped off by an elderly scientist, uncovers the truth about a nuclear power plant and tumbles into danger as a result.
Those steps included the establishment of an investigative unit to look into tips about the possible use of performance-enhancing drugs.
It began with a tip to Dan Moldea, an investigative journalist, from a man who claims to have seen someone being buried at the house in Roseville around the time that Hoffa disappeared, on 30 July, 1975.
Silicon Valley tech press keep up a steady drumbeat of storytelling covering hundreds of startups and larger technology companies, fueled by a combination of PR, investigative journalism, and good old fashioned tips.
"Well, somebody at our paper got a tip that there was an investigation going on," said Dan Herbeck, an investigative reporter for the News who digs into "whatever the News calls for".
Agencies with investigative powers have become more responsive to tips from whistle-blowers.
