Even so, much essential evidence is missing.
Michael Williams had not presented these issues in the Virginia courts because, he said, the state itself suppressed the facts and made essential evidence unavailable to him.
Appearing on the German TV series Tatort (Crime Scene) as a tramp, he extracted a grand banquet from the police in return for essential evidence in a murder case.
This is a law that continues to guarantee the availability to the police, to the law enforcement, the national security authorities, to essential evidence in criminal and terrorism investigations".
"Rajaratnam's statements in these three recorded conversations are essential evidence of the insider trading charges against Gupta in this case," according to a memo written by Reed Brodsky and Richard Tarlowe, assistant United States attorneys.
From confidential reports describing conditions in the countryside, where a million died of starvation, to confessions under torture of thousands of prisoners killed by the secret police, the archive provided essential evidence during the trial of two former Khmer Rouge leaders, Khieu Samphan, 83, and Nuon Chea, 88, who were finally convicted of crimes against humanity in August this year.
But this is not an ideal Sam Cooke set: the dream box would, among other things, excise the supper-club crooning included here and replace it with selections from Cooke's gospel days with the Soul Stirrers, essential evidence for the argument set forth in the title of this boxed set.
This is essential evidence for underpinning collection management protocols.
The outside skin of the aircraft also can provide essential evidence, says Mr Learmount.
This has been used as an essential evidence to demonstrate the polarization-dependent resistive switching effect in ferroelectric heterojunctions [4].
