"We used a chair, or something like that, to simulate the open door," Mr. Smith testified, "because only one of the doors on the truck would open".
It is more difficult to testify because of the potential that the defendant will say something that contradicts a previous statement, opening up the defendant to cross-examination.
A defense psychologist testified on Monday that the athlete was unfit to testify because of a "severe" mental condition that included symptoms of post-traumatic stress disorder.
In 1983, three psychiatrists warned Ms. Katz-Bierenbaum that her husband was homicidal, but a judge ruled last month that they cannot testify because of patient confidentiality.
Mark Geragos, Anderson's lawyer, argued that Anderson should not have to testify because of the numerous leaks about grand jury testimony in the original Balco case.
On Friday, John Whittingdale, chairman of a parliamentary investigative panel, said it was likely that James Murdoch, the heir-apparent to his father's businesses, would be recalled to testify because of allegations that he had previously misled Parliament.
"The Federal Bureau of Investigation personnel involved in the San Francisco investigation of Barry Bonds have advised my client that you cannot compel her to testify and that she should not testify because of the pending criminal proceeding," Garbus wrote.
William Joseph Linklater, Mr. Davidge's lawyer, said that although he had not read the motion, "if the suggestion is that Mr. Davidge should not testify because of some violation of disciplinary rule, it is without foundation".
Cowan had previously ruled that Redstone would not have to testify because of his severe speech impediment and declining health.
