The prosecution, which claims it acted on its own, used its challenges effectively, if reprehensibly.
He had to clear everything he said with the prosecution, which gave them an unfair advantage.
It was also helpful to the prosecution, which upped its request from 30 years to life in prison without parole.
The grand jury works with the prosecution, which has the investigative services of the police at its disposal.
He changed his story, dramatically, to fit the prosecution, which prompted his judge to call him "an absolute liar".
The prosecution, which concluded its case last week, has to prove that Mr. Blagojevich knowingly and intentionally violated the law.
The prosecution, which was led by Louis Freeh, who went on to be the director of the F.B.I., estimated that the trial would take six or seven months.
Following a successful appeal from the prosecution, which argued that Mengistu's crimes merited more than a life sentence, in May 2008 he was sentenced to death.
Mr Walker's evidence is central to the prosecution, which must prove that Mr Milosevic had personal responsibility for Serbian atrocities in Kosovo.
Numerous witnesses testified for the prosecution, which argued that Ms. True knowingly bought ancient artifacts of dubious provenance for the collection of the Getty Museum in Los Angeles.
The prosecution, which expressed skepticism on Monday about the psychological assessment of Mr. Tarloff, is expected to have its own expert examine him on Tuesday.
