Also known as: substantive evidences · substantive proof
Written by attorneys · grounded in primary & secondary sources — see below
Evidence admitted to prove the truth of a fact in issue. Such evidence may be received for its probative force on the merits rather than for a limited purpose such as impeachment or rehabilitation.
Sean Steele stood trial for theft. The prosecutor asked the jury to infer guilt from Steele's decision not to testify. The court sustained an objection and instructed the jury that silence supplies no substantive proof of the charged offense.
Samuel Soto faced drug charges after officers searched his car. The court suppressed the resulting confession for the prosecution's case in chief. On cross-examination Soto denied making the statements, so the government introduced the confession solely to contradict his testimony and not as substantive proof of guilt.
Samantha Stone was prosecuted for cocaine possession. The state offered a chemist's certificate stating that the seized powder tested positive. Because the analyst did not appear, the court excluded the certificate as substantive evidence of the substance's identity.
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Sierra Santos stood trial for assault. The state sought to introduce a witness's out-of-court statement to police describing the attack. The court ruled the statement testimonial and therefore inadmissible as substantive evidence without prior cross-examination.
Scott Summers moved to suppress heroin found during an unlawful search. The court granted the motion for the prosecution's case in chief. When Summers testified that he never possessed the drugs, the government used the suppressed evidence only to impeach that testimony.
Sasha Stone faced charges involving counterfeit pills. A state toxicologist testified that mass-spectrometry data from a foreign lab matched known counterfeit profiles. The court admitted the expert's independent conclusion while instructing the jury that the underlying data were not received as substantive proof of the pills' identity.
A prior inconsistent statement qualifies as non-hearsay and may be received for its truth when the declarant testifies at trial, is subject to cross-examination, and the statement was given under penalty of perjury in a deposition or similar proceeding.
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Under the Williams plurality approach the clause is not violated when the expert offers an independent opinion and the underlying data are not admitted for their truth. The data serve only as the basis for the expert's reasoning.
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No. The Fifth Amendment forbids the prosecutor or the trial judge from inviting the jury to treat the defendant's failure to testify as substantive evidence of guilt.
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…other than the accused and not taken under oath, unlike ex parte depositions or affidavits, were generally not considered substantive evidence upon which a conviction could be based.[^maj-11] See, e. g. , King v. Brasier , 1 Leach 199, 200, 168 Eng. Rep. 202 (K. B. 1779); see also J. Langbein, Origins of Adversary Criminal Trial…