Isabel dos Santos, Africa’s richest woman and the daughter of Angola’s former president, is set to be charged with committing crimes to enrich herself, after an investigation into embezzlement of millions of dollars from a state oil company she once headed, Angolan officials said.

Angola’s attorney general, Hélder Pitta Grós, said on late Wednesday that Ms. dos Santos would be charged with “money laundering, influence peddling, harmful management” and “forgery of documents, among other economic crimes” committed when she ran the oil company.

“I can say that from the investigation we conducted, we will now move to criminal charges,” Mr. Pitta Grós said, speaking at a news conference in Luanda, the country’s capital.

The announcement came days after a trove of documents obtained by the International Consortium of Investigative Journalists and shared with The New York Times revealed Ms. dos Santos’s efforts to profit on business dealings tied to the Angolan government. Those connections helped her build a fortune worth over $2 billion, according to Forbes.