It must have a reasonable belief that a crime has been committed and evidence of probable cause that records or other evidence of the crime will be found at the location desired to be searched.

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And so, true to form, in July 1997, Reno's staff turned down the FBI's request for permission to search Lee's computer because the agents lacked the "probable cause" evidence required by law.

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Critics also say it is unfair the US authorities need only to outline the alleged offence, and provide "evidence or information that would justify the issue of a warrant for arrest in the UK" whereas British police must provide the American courts with evidence of "probable cause" if it wishes to extradite someone.

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The report said the evidence suggested a "probable, but weak, causal link between psychotic illness, including schizophrenia, and cannabis use".

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The warrants, signed by District Judge Timothy Williams and given to CNN by Las Vegas affiliate KTNV, say that "there is probable cause to believe" that the searches would uncover evidence at Murray's home and office of excessive prescribing, prescribing to an addict, prescribing to or treating an addict and manslaughter.

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If it can be determined that Fuhrman has a pattern of fabricating probable cause, and if the defense can show there is evidence he made have done so in this case, the defense could seek to have all the evidence found by Fuhrman thrown out of the case.

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The non-breaching party must prove its damages providing evidence establishing to a reasonable certainty the nature and extent of the probable loss it has sustained or will in the future sustain.

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