The F.B.I. searched the home of Jesse Powell, the founder of the cryptocurrency exchange Kraken, in March.

The F.B.I. searched the home of Jesse Powell, the founder of the cryptocurrency exchange Kraken, in March.

The investigation is focused on allegations that Powell hacked and cyber-stalked a nonprofit arts group that he founded.

The nonprofit, called the Center for Growth and Opportunity, has accused Powell of interfering with its computer accounts and blocking access to emails and other messages.

Powell has denied the allegations, calling them "baseless" and "an attempt to smear my reputation."

The investigation is being conducted by the F.B.I. and the U.S. attorney's office for the Northern District of California.

Powell is the CEO of Kraken, which is one of the largest cryptocurrency exchanges in the world.

Kraken is based in San Francisco and has over 5 million customers.

The investigation into Powell is ongoing.

Powell has not been charged with any crimes.

 The allegations against Powell have raised concerns about the security of Kraken and the cryptocurrency industry as a whole.