The consultant had deleted records involving McKinsey’s role in pushing OxyContin sales and driving the opioid crisis.

Guo Wengui fled China and allied with the American right in a quixotic quest to end Communist rule. U.S. prosecutors say he stole over $1...

Charged with defrauding thousands of investors in the U.S. and overseas of more than $1 billion, Guo Wengui could face decades in prison.