Federal prosecutors said Robert T. Brockman had used a web of entities based in Bermuda and Nevis, as well as secret bank accounts in Bermuda and Switzerland, to hide $2 billion in income from the I.R.S.Federal prosecutors said Robert T. Brockman had used a web of entities based in Bermuda and Nevis, as well as secret bank accounts in Bermuda and Switzerland, to hide $2 billion in income from the I.R.S.NYT > U.S. News