Also known as: prosecution's case in chief · prosecutions case in chief · case in chief · case-in-chief · prosecution case
Written by attorneys · grounded in primary & secondary sources — see below
The portion of a criminal trial during which the government presents its primary evidence to establish the defendant's guilt beyond a reasonable doubt.
Priscilla Parks was arrested on drug charges after officers gave incomplete Miranda warnings. She made voluntary statements admitting involvement. At trial Priscilla testified she had never handled the drugs. The prosecutor introduced her earlier statements only after she took the stand. The statements could not support the government's affirmative proof of guilt but were admitted to challenge her credibility.
Pedro Pacheco was indicted for stealing trade secrets. Agents questioned him without counsel present after he had already consulted a lawyer. He signed a form and made voluntary admissions. At trial Pedro denied any involvement. The prosecutor introduced the statements solely to contradict his testimony once the court found a knowing waiver. The statements remained unavailable during the government's initial presentation of evidence.
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Priya Prasad faced charges after officers relied on a warrant later found to lack probable cause. The seized documents were excluded under the Fourth Amendment. The prosecutor presented only admissible evidence during the initial phase of trial to prove the elements of the offense. The suppressed items could not be offered until the defense opened the door through inconsistent testimony.
Preston Pratt entered an Alford plea to assault charges while maintaining innocence. The court accepted the plea based on the strength of the government's evidence. At a later sentencing hearing the prosecutor could not rely on the plea itself as affirmative proof of guilt in a related proceeding. The plea record remained unavailable for use during the prosecution's primary case presentation.
Perry Pratt remained silent after receiving Miranda warnings and was later charged with robbery. The prosecutor attempted to introduce evidence of his silence during the government's opening presentation. The court excluded the silence because it could not be used to prove guilt. The evidence stayed out of the prosecution's case in chief entirely.
Paul Peterson was charged with escape after leaving a federal facility. He planned to raise a duress defense at trial. The government presented only its affirmative evidence of the escape elements during its initial case. Evidence relevant solely to rebutting duress remained outside the prosecution's case in chief until the defense introduced its theory.
Statements obtained without proper Miranda warnings are excluded from the prosecution's case in chief even if voluntary. The same statements may be used to impeach the defendant's credibility if the defendant testifies inconsistently. This distinction preserves the constitutional protection while allowing the jury to assess truthfulness on the stand.
Supporting sources
Statements taken after indictment without counsel present cannot be used in the prosecution's case in chief. The statements remain available for impeachment if they were voluntary and the defendant made a knowing and intelligent waiver. The rule focuses on whether the waiver occurred at the time of the interview rather than on earlier consultations with counsel.
Supporting sources
Evidence obtained in violation of Miranda or the Sixth Amendment must be kept out of the prosecution's case in chief. Introducing such evidence at that stage risks reversible error because the statements cannot serve as affirmative proof of guilt. The court may still permit limited use later for impeachment if the defendant testifies inconsistently.
Supporting sources
…case presents the question whether the Fourth Amendment exclusionary rule should be modified so as not to bar the use in the prosecution’s case in chief of evidence obtained by officers acting in reasonable reliance on a search warrant issued by a detached and neutral magistrate but ultimately found to be unsupported by probable cause. To…