WASHINGTON -- The U.S. government's key witness in its fraud and conspiracy trial against former PaineWebber Inc. Vice President Lance Wilson admitted repeatedly yesterday to committing crimes and perjuring himself before Congress, the Internal Revenue Service, the courts, and even the independent prosecutors.

In cross-examination on the witness stand, Wilson's attorney succeeded in getting former Housing and Urban Development Department Deputy Secretary DuBois Gilliam to admit dozens of illegal acts and lies, including some that were unknown to the prosecutors. The attorney's intent was to discredit the testimony, which represents the core of the government's case, presented by Gilliam last week.

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