The Massachusetts standard governing the central disputed issue.
Evidence Cards
Card #01: What the parties agree and dispute
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The trial's central legal divide.
[VERIFIED FACT] Defense counsel conceded that Lindsay Clancy physically caused the children's deaths; the defense contests criminal responsibility, not identity. [Defense stipulation report](https://www.courttv.com/news/defense-lindsay-clancy-willing-to-stipulate-to-her-involvement-in-kids-deaths/) · [Trial Day 1](https://www.youtube.com/watch?v=_v9vz_Nw3lE)
[ALLEGATION] The prosecution argues that the errands, communications, timing, and scene show intentional and planned killings by a criminally responsible actor. [Trial Day 1](https://www.youtube.com/watch?v=_v9vz_Nw3lE)
[DISPUTED CLAIM] The defense argues that severe mental illness and medication effects left Clancy legally unable to appreciate wrongfulness or conform her conduct to law. Defense experts had not testified by the Day 11 cutoff. [Trial Day 1](https://www.youtube.com/watch?v=_v9vz_Nw3lE) · [Court TV tracker](https://www.courttv.com/news/lindsay-clancy-trial-opening-statements-set-for-mom-accused-of-killing-her-3-children/)
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Topic: Criminal Responsibility Law. Comments: 0.
Card #02: Massachusetts test
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The legal standard supplied to juries.
[VERIFIED FACT] Lack of criminal responsibility exists when mental disease or defect causes a person to lack substantial capacity either to appreciate the criminality or wrongfulness of conduct or to conform conduct to law. [Massachusetts model instruction](https://www.mass.gov/info-details/model-jury-instructions-on-homicide-i-criminal-responsibility)
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Card #03: Symptoms versus legal conclusion
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Why serious symptoms do not decide the verdict by themselves.
[VERIFIED FACT] The Massachusetts criminal-responsibility test asks whether mental disease or defect removed substantial capacity to appreciate wrongfulness or conform conduct to law; a diagnosis alone does not resolve that test. [Massachusetts model instruction](https://www.mass.gov/info-details/model-jury-instructions-on-homicide-i-criminal-responsibility)
[UNKNOWN] Defense expert testimony addressing that ultimate question had not begun by the Day 11 cutoff. [Court TV tracker](https://www.courttv.com/news/lindsay-clancy-trial-opening-statements-set-for-mom-accused-of-killing-her-3-children/)
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Card #04: Burden and presumption
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Who must prove responsibility.
[VERIFIED FACT] The Commonwealth must prove criminal responsibility beyond a reasonable doubt after the issue is properly raised; the jury evaluates all relevant evidence rather than requiring a particular diagnosis. [Massachusetts model instruction](https://www.mass.gov/info-details/model-jury-instructions-on-homicide-i-criminal-responsibility)
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Card #05: What toxicology cannot decide
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Concentration is not the criminal-responsibility verdict.
[UNKNOWN] Therapeutic or non-toxic concentrations do not by themselves establish a person's mental state, medication interaction effects, or legal responsibility at a prior moment; those questions require clinical and legal analysis beyond the assay result. [Massachusetts instruction](https://www.mass.gov/info-details/model-jury-instructions-on-homicide-i-criminal-responsibility) · [Trial Day 7](https://www.youtube.com/watch?v=5YuM1a0J08Y)
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Card #06: Bifurcation ruling
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Why act evidence and responsibility evidence remained in one trial.
[VERIFIED FACT] Judge Sullivan denied bifurcation because witnesses and evidence bearing on the acts and criminal responsibility substantially overlapped; compelled-examination statements were limited to rebuttal after the defense placed responsibility in issue. [Court TV ruling](https://www.courttv.com/news/judge-denies-lindsay-clancys-request-to-split-trial-in-2-phases/)
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Card #07: Burden of proof
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The Commonwealth retains the legal burden.
[VERIFIED FACT] Once criminal responsibility is at issue, the Commonwealth must prove beyond a reasonable doubt that the defendant was criminally responsible under Massachusetts law. [Massachusetts model instruction](https://www.mass.gov/info-details/model-jury-instructions-on-homicide-i-criminal-responsibility)
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Card #08: Criminal responsibility, not sympathy
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The legal test that controls the defense.
[VERIFIED FACT] The defense must place criminal responsibility in issue, but the Commonwealth bears the burden of disproving lack of responsibility beyond a reasonable doubt. [Massachusetts model instruction](https://www.mass.gov/info-details/model-jury-instructions-on-homicide-i-criminal-responsibility)
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Card #09: December 13, 2024
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Criminal-responsibility notice.
[VERIFIED FACT] Defense counsel notified the court that Clancy would rely on lack of criminal responsibility and statements concerning her mental condition. [Defense filing report](https://www.boston25news.com/news/local/lindsay-clancy-mom-accused-killing-her-3-kids-pursue-insanity-defense-lawyer-says/SMSBPWLDGJCZBLUPF7BD443YXQ//)
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Card #10: March 31, 2026
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Bifurcation denied.
[VERIFIED FACT] Judge Sullivan denied a defense request to split the trial, finding substantial overlap between evidence about the acts and criminal responsibility. [Court TV ruling](https://www.courttv.com/news/judge-denies-lindsay-clancys-request-to-split-trial-in-2-phases/)
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Card #11: Physical acts and legal responsibility
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The defense's express boundary.
[VERIFIED FACT] Defense counsel has conceded Clancy's physical involvement in the children's deaths. [Stipulation report](https://www.courttv.com/news/defense-lindsay-clancy-willing-to-stipulate-to-her-involvement-in-kids-deaths/)
[DISPUTED CLAIM] Whether mental disease or defect removed criminal responsibility is the contested trial question and had not been decided by Day 11. [Massachusetts instruction](https://www.mass.gov/info-details/model-jury-instructions-on-homicide-i-criminal-responsibility) · [Trial Day 1](https://www.youtube.com/watch?v=_v9vz_Nw3lE)
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Card #12: Pretrial responsibility and evidence rulings
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The legal shape of the trial.
[VERIFIED FACT] The court denied bifurcation, permitted a limited jury view, reviewed blood-pattern reliability, and admitted the 911 call with restrictions and a limiting instruction. [Bifurcation ruling](https://www.courttv.com/news/judge-denies-lindsay-clancys-request-to-split-trial-in-2-phases/) · [Forensics report](https://www.courttv.com/news/defense-fights-voodoo-forensics-in-lindsay-clancys-murder-trial/) · [911 ruling](https://www.wcvb.com/article/lindsay-clancy-911-call-allowed-evidence/71773039)
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Card #13: Post-event psychiatric observations
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Clinical encounters after the incident.
[SWORN TESTIMONY] Post-event psychiatric witnesses described their observations, including no overt psychosis in certain encounters; those later observations do not alone resolve Clancy's condition at the offense time. [Trial Day 5](https://www.youtube.com/watch?v=0ol0huRYsso) · [Massachusetts instruction](https://www.mass.gov/info-details/model-jury-instructions-on-homicide-i-criminal-responsibility)
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Topic: Criminal Responsibility Law. Comments: 0.