expose a fraud
reveal a fraud

Thus, there was little financial incentive to track down and expose fraud.

I therefore call upon the Commission to submit proposals for more money to be used to expose fraud before it takes place.

They specialize in exposing frauds, and have become associated with scientific skepticism.

The Senate today approved a bill to increase job protection for Federal workers who expose waste, fraud and abuse.

Congress passes a bill to protect the job of whistle blowers who expose government waste or fraud.

In striking contrast, the handful of scientists who tried to expose frauds were lonely indeed.

In companies in other countries, whistle-blowers were less likely to expose frauds, the study found.

It has done bold and seasonable service in exposing frauds which threatened the commercial community.

As a writer who has exposed corporate fraud, I was selling my understanding of events around corporate accounting.

The paper, Paul Pry, exposed political corruption and fraud.