Lisa M. Newell, 44, a Justice Department senior trial attorney in the criminal division's office of special investigations, died of breast cancer Jan. 7 at her home in Washington.

She had worked for Justice since 1995. Over the years, she had served as lead counsel in successful prosecutions involving the denaturalization and deportation of Nazi war criminals.

Ms. Newell, an authority on pay equity law, was in private practice in Washington from 1983 to 1991.

She had represented labor unions and individuals in class-action lawsuits involving pay equity issues.

In 1983, she served as co-counsel, representing the American Federation of State, County, and Municipal Employees, in a suit that resulted in what The Washington Post called "a landmark `comparable-worth' ruling" against the government of the State of Washington that resulted in the award of millions of dollars of back wages and raises to about 15,000 female state employees.

Suits Ms. Newell pursued against Washington state, the City of New York and others led to settlements of more than $300 million to women and minorities.

From 1991 to 1995, Ms. Newell was a pay equity consultant and an adviser to the National Committee on Pay Equity. She was the author of a committee publication on the role of labor unions in the struggle for pay equity.

Ms. Newell, who was born in New York City, came to the Washington area in 1975. She was a graduate of Hamilton College and Catholic University's law school.

She had been active in educational and charitable work with the Fabrangen Jewish Community in Washington.

Survivors include her husband, Solomon G. Jacobson, whom she married in 1990, their son, Abraham Benjamin, and her parents, William and Hilda Newell, all of Washington; and a brother.