You posted the Wiki link as your source. I posted the NY Times and further add the WSJ from today.
I have said that Wiki is unreliable. Correct me if I am wrong, but scorn is your word.
The Justice Department inquiry into the business dealings of the president’s son has remained active, with a grand jury seeking information about payments from around the world.
www.nytimes.com
A grand jury heard witness testimony in February about the past drug use and spending habits of the president’s son.
www.wsj.com
So the NY Times, WSJ, US Justice Department, the FBI, and the U.S. attorney’s office in Delaware investigations are not enough for you? Nothing more I can do here. As the Brits say "Carry On"...