The documents state that the aide intervened with Ney on behalf of Abramoff client Foxcom, which was seeking a contract to provide wireless services to the House. Foxcom, which has since been renamed MobileAccess, obtained the contract with Ney's approval.
Neil Volz, a former chief of staff to Ney, joined Abramoff's lobbying team at Greenberg Traurig after leaving the congressional payroll in February 2002. He also served as staff director to the House Administration Committee, chaired by Ney.
Volz on Tuesday referred questions to his lawyer, who did not respond to a request for comment.
Among new items cited in the court filings were $1.1 million in fees skimmed from a New Mexico Indian tribe and $1.6 million in fees diverted from conglomerate Tyco International, which had hired Abramoff and his law firm to fight unfavorable tax legislation. The Tyco money was paid to GrassRoots Interactive, an Abramoff-controlled company, the government charged.
Abramoff, according to the documents, did not disclose to Tyco that he controlled GrassRoots.
Federal sentencing guidelines in Abramoff's case call for a prison term of 108 to 135 months. The government said in court papers that it would support a further reduction if he fully complied with the plea agreement and provided "substantial assistance" in the investigation. Ultimately, the sentence is up to the judge.
Some legal experts said Abramoff could be providing assistance for a long time.
"It is not unusual for a major white-collar cooperator to spend years cooperating," said Daniel R. Alonso, a former federal prosecutor and public-corruption expert in New York.
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Times staff writer Chuck Neubauer contributed to this report.
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Abramoff's crimes
Here are details of the three federal charges to which lobbyist Jack Abramoff pleaded guilty, according to a Justice Department filing in U.S. District Court in Washington:
Conspiracy
* Abramoff and then-partner Michael P.S. Scanlon conspired to defraud Indian tribes in Louisiana, Michigan, Mississippi and Texas of millions of dollars. Abramoff made about $20 million in hidden profits from the scheme. Scanlon pleaded guilty to related charges in November.
