A former visiting lawyer at Gibson, Dunn & Crutcher, Romero Cabral Da Costa Neto, has been arrested and charged with insider trading. Costa Neto is affiliated with the prestigious Brazilian firm Mattos Filho. The charges allege that he used confidential law firm files to trade ahead of a high-profile merger and acquisition.
Federal prosecutors in Washington D.C. assert that Costa Neto, 33, based in Rio de Janeiro, was arrested in Washington D.C. by the FBI, and is also subjected to a separate SEC lawsuit over similar allegations.
In response to these developments, Gibson Dunn, stated that they are fully cooperating with the authorities in the investigation.
A short summary of this situation can be found at Law.com.