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Board-certified forensic psychologist Called as prosecution expert witness in Commonwealth v. Lindsay Clancy Concluded Lindsay Clancy was "criminally responsible" at time of killings Testified that Clancy killed children "out of love"
Extensive experience in forensic psychology Expert in criminal responsibility evaluations Published research on insanity defense Testified in numerous high-profile cases Concluded Lindsay Clancy was "criminally responsible" at time of killings Testified Clancy killed children "out of love" (to prevent them from witnessing her suicide) Challenged defense claims of psychosis Presented alternative interpretation of Clancy's mental state At time of killings, Clancy was able to appreciate wrongfulness of actions Did not meet criteria for insanity defense under Massachusetts law Mental state did not rise to level of psychosis Testified Clancy killed children "out of love" Argued she wanted to prevent them from witnessing her suicide Presented as alternative to psychotic episode theory Questioned credibility of psychosis diagnosis Presented alternative explanations for symptoms Challenged defense expert conclusions
Published research on criminal responsibility Studies on insanity defense evaluations Work on forensic psychology assessments Expert opinions on mental state evaluations
Lindsay Clancy - Defendant Jennifer Sprague - Lead prosecutor (who called him as witness) Dr. Phillip Resnick - Defense expert (opposing expert) Dr. Gregory Saathoff - Prosecution rebuttal witness Plymouth Superior Court - Where he testified
Trial testimony (July-August 2026) Expert witness report Published research Court documents Media coverage
personperson
Dr. Kirk Heilbrun
- Board-certified forensic psychologist
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Related records and sources, aggressive cross-reference
Day 20, Heilbrun testimony
Criminally responsible, out of love
Day 20, Saathoff rebuttal
Voice unconvincing, FBI BAU
Glossary, McHoul
McHoul, psychosis, filicide, involuntary intoxication
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Entity Type: Person
Role: Prosecution Expert Witness
Profession: Forensic Psychologist
Expertise: Criminal Responsibility, Insanity Defense Evaluation
Background
Expert Testimony
Qualifications
Testimony in Clancy Case
Key Points
1. Criminal Responsibility
2. Motive Theory
3. Challenged Defense Claims
Research and Publications
Related Entities
Sources
Sources: cross-referenced from timeline (48 events), transcripts (YouTube-linked, 14), filings (35) and glossary (73). See related records above for direct links to files and transcript parts.