08/22/2026
There is no question about who killed the three Clancy children in this trial. Lindsay Clancy’s own defense has conceded that she did.
I am Dr. Shannon Curry, a clinical and forensic psychologist, and I conduct evaluations of criminal responsibility in cases like this one.
So here is what the jury is actually deciding. Under Massachusetts law, that question is whether, because of mental disease or defect, Lindsay Clancy lacked substantial capacity either 1) to appreciate the wrongfulness of her conduct, OR, 2) to conform her conduct to the requirements of law. Only one of those has to be true.
Pleading insanity is far riskier than most people realize— The insanity defense is raised in fewer than ONE PERCENT of felony cases in this country. ONLY about a quarter of those succeed, and most of the successful ones are resolved before a trial ever begins. The fact that this case is being tried at all tells you that “whether or not she did it” was not on the table. Trials like these sit on top of an ocean of records. Years of investigation, medical history, and expert analysis are in front of that jury, and no televised proceeding can show you all of it. What reaches your screen is a sliver of the facts of what happened.
For these reasons, there is much to learn about the limits of or own knowledge. Please remember that social media often favors the loudest voices, not the wisest. If you’re interested in learning about psychology and the law, and something about this case has been nagging at you, ask me in the comments.
If you or your loved one is experiencing a mental health crisis, call or text 988 (available 24/7, free, and confidential).
Free support is available to individuals with mental illness and their families: Contact the National Alliance on Mental Illness (NAMI) HelpLine at 1-800-950-6264 or text “NAMI” to 62640.
To locate public mental health programs near you, contact the SAMHSA National Helpline at 1-800-662-4357 or use the treatment locator tool at findtreatment.gov