Anderson said he will keep silent Friday at a hearing ordered byU.S. District Court Judge Susan Illston, who wanted to determineAnderson's intentions without a jury present. Bonds' trial isscheduled to begin Monday.
Without Anderson's testimony, the judge is barring prosecutorsfrom showing jurors key evidence such as positive drug testsalleged to have belonged to Bonds.
Prosecutors said in court papers they will demand Anderson bejailed for contempt. Anderson previously served a year in prisonfor refusing to testify before a grand jury.
Bonds is accused of lying to a grand jury when he denied heknowingly took performance-enhancing drugs.