>"The Justice Department has opened a criminal probe into whether traders are manipulating the price of Bitcoin and other digital currencies, dramatically ratcheting up U.S. scrutiny of red-hot markets that critics say are rife with misconduct, according to four people familiar with the matter.
[...]
Federal prosecutors are working with the Commodity Futures Trading Commission, a financial regulator that oversees derivatives tied to Bitcoin, the people said."
Why isn't there a better source for this than "four people"? I didn't see anything on the DOJ site. Perhaps they are talking about this: https://www.cftc.gov/PressRoom/PressReleases/7731-18
However, that doesn't mention the DOJ so maybe not. Is it normal for the DOJ to anonymously report its activities to journalists like this?