Abstract
In January 2023, Lindsay Clancy, a Massachusetts labor-and-delivery nurse and mother of three, allegedly strangled her three young children before attempting suicide. Her 2026 trial ended in a mistrial after a deadlocked jury, leaving the legal question of guilt and mental state formally unresolved. Public discourse around the case has concentrated on two explanatory frameworks: severe postpartum psychiatric illness and adverse medication effects. This essay argues that a third, empirically well-supported pathway — chronic, unsupported caregiving burden, formalized in the psychological literature as parental/caregiver burnout — deserves comparable attention. Rather than adjudicating what happened in this specific, legally unresolved case, this essay uses it as a starting point to review the research literature on three theoretically plausible contributing pathways to catastrophic caregiver breakdown, with particular emphasis on the third, less publicly recognized mechanism. We argue that these pathways are not competing explanations but frequently interacting risk factors, and we discuss implications for clinical screening and public health prevention.
Keywords: filicide, postpartum psychosis, parental burnout, caregiver burden, antidepressant adverse effects
1. Introduction
The case of Lindsay Clancy has drawn sustained public attention since January 2023, when she was accused of strangling her three children — 5-year-old Cora, 3-year-old Dawson, and 8-month-old Callan — in their Duxbury, Massachusetts home, before attempting to take her own life by jumping from a second-story window, an act that left her permanently paralyzed. Her 2026 trial ended in a mistrial after the jury deliberated for more than 36 hours and remained deadlocked; no verdict was reached, and the case may be retried. Her defense argued that she suffered from postpartum psychosis exacerbated by psychiatric medication; the prosecution disputed that account. Because the legal process has not produced a resolved factual or clinical record, this essay does not attempt to diagnose Clancy or assert what occurred in her particular case. Instead, it uses the case — and the public debate surrounding it — as an entry point for a broader, evidence-based discussion of why psychologically "ordinary," often well-regarded caregivers occasionally reach a point of catastrophic breakdown.
Public commentary on cases like this has tended to converge on two explanatory frameworks. The first centers on severe psychiatric illness, particularly postpartum depression or postpartum psychosis (Bergink et al., 2016). The second centers on adverse or paradoxical effects of psychiatric medication, an area that remains genuinely contested within psychiatry and pharmacology (Healy et al., 2006; Sharma et al., 2016). A third pathway — chronic, unsupported caregiving burden, without adequate rest, relief, or social support — receives comparatively little public attention, despite a substantial and growing empirical literature documenting its role in parental neglect, violence, and, in extreme cases, filicide-suicide (Friedman et al., 2005; Mikolajczak et al., 2018). This essay reviews all three pathways, with a particular focus on the third, and argues for an integrative rather than competitive framework.
2. Three Candidate Explanatory Pathways
2.1 Severe postpartum psychiatric illness
Postpartum psychosis is a well-characterized psychiatric emergency, distinct from postpartum depression, involving delusions, hallucinations, disorganized thought, and a markedly elevated risk of both suicide and infanticide (Bergink et al., 2016). Population-based studies estimate its incidence at roughly 0.25–0.6 per 1,000 births, with onset typically within the first weeks postpartum. Unlike postpartum depression, which is primarily a mood disturbance, postpartum psychosis involves a genuine break from reality, and case reviews of maternal filicide consistently identify affective disorders and psychosis as the most prominent psychiatric correlates among mothers who kill their children (Hatters Friedman & Resnick, 2007). This is the pathway most directly invoked by Clancy's defense.
2.2 Adverse medication effects
A second, more contested pathway concerns the possibility that psychiatric medications — particularly selective serotonin reuptake inhibitors (SSRIs) — can, in a small subset of patients, induce akathisia (severe motor restlessness), emotional blunting, or manic/psychotic activation, which have been associated in case reviews and pharmacovigilance data with rare instances of self-harm or violence toward others (Healy et al., 2006; Moore et al., 2010). A systematic review of clinical study reports found evidence of increased suicidality and aggression in antidepressant trial data compared with placebo (Sharma et al., 2016). It is important to note that this literature remains scientifically debated: critics argue that the underlying depressive or psychotic illness, rather than the medication itself, better explains these outcomes in most cases, and that the absolute risk in any individual patient is low. Nonetheless, regulatory agencies in the United States, the United Kingdom, and Canada have issued formal warnings regarding treatment-emergent agitation and activation, particularly during dose initiation or adjustment (Healy et al., 2006).
2.3 Caregiver/parental burnout: the underrecognized pathway
The least publicly discussed pathway is chronic, unsupported caregiving burden — a construct with deep empirical roots in gerontological caregiving research and, more recently, formalized specifically for parenting contexts. Pearlin et al. (1990) proposed the foundational "stress process" model, distinguishing primary stressors (hardships intrinsic to caregiving itself) from secondary stressors (role strain and loss of self-concept that accumulate around the caregiving role). This framework, originally developed for caregivers of aging or chronically ill relatives (see also Zarit et al., 1980, on caregiver burden), has since been extended to parenting.
Building on this tradition, Mikolajczak and colleagues have developed and validated the construct of parental burnout: a syndrome distinct from depression, job burnout, and ordinary parenting stress, characterized by overwhelming exhaustion related to the parental role, emotional distancing from one's children, and a sense of parental ineffectiveness (Mikolajczak & Roskam, 2018). Using longitudinal, cross-lagged designs across two large samples, Mikolajczak et al. (2019) found that parental burnout prospectively predicted escape ideation, suicidal thoughts, addictive behavior, and — critically — neglectful and violent behavior toward children. A related study, based on a sample of 1,551 parents, found that parental burnout showed a specific and disproportionate association with child neglect and violence, distinguishing it from parental stress and depression, which did not show the same magnitude of effect on these outcomes (Mikolajczak et al., 2018). Notably, this body of research finds that parental burnout occurs when caregiving demands chronically exceed available resources — a formulation directly analogous to the "risks vs. resources" framework used in occupational burnout research (Mikolajczak & Roskam, 2018).
This pattern is not unique to parenting. In caregivers of elderly or disabled relatives, chronic unsupported strain has likewise been linked to a small but consistent number of caregiver-perpetrated homicide-suicides, disproportionately involving caregivers of a chronically ill or declining spouse or relative, most of whom had documented depressive symptoms but had rarely received psychiatric treatment (Bourget et al., 2010; Cohen et al., 1998).
3. Why These Pathways Should Be Treated as Interacting, Not Competing
A recurring problem in public discourse — visible in coverage of the Clancy case — is the tendency to treat "she was mentally ill," "she was overmedicated," and "she was overwhelmed" as rival, mutually exclusive theories. The empirical literature does not support this framing. Chronic caregiving burden without relief is itself a well-documented pathway into depressive symptomatology. Sleep disruption — one of the most consistently identified primary stressors in new parenthood — is independently associated with elevated risk of postpartum depression, with recent umbrella-review evidence identifying sleep disorders as one of the strongest single risk factors for postpartum depression (odds ratio approximately 2.36; Xu et al., 2026), consistent with earlier work linking postpartum sleep disruption to mood and psychiatric symptom severity (Okun, 2015). Depression itself is, separately, a well-established risk factor for violence in general population studies (Fazel et al., 2015), and for filicide specifically among mothers with severe psychiatric illness (Hatters Friedman & Resnick, 2007). A medication reaction occurring in a patient who is already depleted by weeks or months of fragmented sleep and unsupported caregiving is, plausibly, a different clinical picture than the same reaction occurring in a well-rested, well-supported patient — though this specific interaction has not, to our knowledge, been directly tested and should be treated as a hypothesis rather than an established finding.
This suggests an integrative model: unsupported caregiving burden functions as a background vulnerability factor that can lower the threshold for, or interact with, both psychiatric illness onset and adverse medication response, rather than operating as an independent, mutually exclusive "third cause."
4. Why Caregiver Burnout Is Underrecognized
Several features of parental/caregiver burnout plausibly explain its low public visibility relative to psychiatric and pharmacological explanations:
It is not a formal psychiatric diagnosis. Parental burnout does not appear in the DSM-5, which means clinicians assessing a mother in crisis have a validated framework for screening depression or psychosis, but no standard clinical pathway for screening burnout severity, despite validated research instruments existing for this purpose (Mikolajczak & Roskam, 2018).
High-functioning masking. Individuals who are conscientious and reluctant to ask for help — often praised, right up until a crisis, for their competence — are systematically less likely to be identified as at risk, because their functioning appears normal externally while internal resources are depleted (Pearlin et al., 1990).
Capacity is not directly observable. Because tolerance for chronic caregiving stress varies substantially between individuals based on sleep, social support, prior psychiatric history, and financial and relational resources, the same objective caregiving load can be sustainable for one parent and unsustainable for another, making population-level risk difficult to communicate as an individual warning sign.
Diffusion of responsibility. Unlike a medication, which has a prescriber, or a diagnosis, which has a treatment pathway, "not enough support" implicates a much larger, more diffuse set of actors — partners, extended family, employers, health systems, and social policy — which may make it a less narratively satisfying explanation than a single pharmacological or psychiatric cause.
5. Implications for Screening and Prevention
The literature suggests several concrete, evidence-aligned prevention strategies:
Routine screening for caregiver/parental burnout, not only depression, using validated instruments, particularly for parents of multiple young children or infants with high care demands (Mikolajczak & Roskam, 2018).
Explicit clinical attention to sleep disruption as a modifiable risk factor during the postpartum period, given its documented association with depressive symptom severity (Okun, 2015; Xu et al., 2026).
Structured relief/respite mechanisms for solo or primary caregivers, extending the logic already established in eldercare research (Pearlin et al., 1990; Zarit et al., 1980) to parents of young children.
Close monitoring during psychiatric medication initiation or dose changes, given regulatory recognition of treatment-emergent activation and agitation risk in a subset of patients (Healy et al., 2006).
Reducing stigma around help-seeking for caregivers who present as high-functioning, since this group is disproportionately likely to mask distress until a breaking point (Mikolajczak et al., 2019).
6. Limitations
This essay is a narrative synthesis intended to broaden the explanatory frame available to non-specialist audiences, not a systematic review, and it does not quantify comparative effect sizes across the three pathways. Critically, none of the caregiver-burnout, filicide, or medication-effects literature reviewed here has been applied diagnostically to Lindsay Clancy herself; her case is used solely as a topical entry point, and the specific determinants of her situation remain a matter for the clinical and legal record, which — following the September 2026 mistrial — remains unresolved. The antidepressant-violence literature in particular remains genuinely contested within psychiatry, and readers should not interpret its inclusion here as settling that debate.
7. Conclusion
Public debate about tragedies like the Clancy case tends to force a choice between "she was mentally ill" and "the drugs did it." The caregiver-burnout literature suggests a third, empirically grounded, and comparatively underrecognized pathway: that sustained caregiving demand without adequate relief or support can independently drive parents — including ones with no prior history of violence, and ones widely regarded as devoted and competent — toward catastrophic breakdown, and can also lower the threshold for depressive and psychotic illness to emerge or worsen. Treating psychiatric illness, medication effects, and caregiver burnout as interacting rather than competing explanations offers a more scientifically defensible account of these tragedies, and a more actionable one for prevention.
References
Bergink, V., Rasgon, N., & Wisner, K. L. (2016). Postpartum psychosis: Madness, mania, and melancholia in motherhood. American Journal of Psychiatry, 173(12), 1179–1188. https://doi.org/10.1176/appi.ajp.2016.16040454
Bourget, D., Gagné, P., & Whitehurst, L. (2010). Domestic homicide and homicide-suicide: The older offender. Journal of the American Academy of Psychiatry and the Law, 38(3), 305–311.
Cohen, D., Llorente, M., & Eisdorfer, C. (1998). Homicide-suicide in older persons. American Journal of Psychiatry, 155(3), 390–396. https://doi.org/10.1176/ajp.155.3.390
Fazel, S., Wolf, A., Chang, Z., Larsson, H., Goodwin, G. M., & Lichtenstein, P. (2015). Depression and violence: A Swedish population study. Lancet Psychiatry, 2(3), 224–232. https://doi.org/10.1016/S2215-0366(14)00128-X
Friedman, S. H., Hrouda, D. R., Holden, C. E., Noffsinger, S. G., & Resnick, P. J. (2005). Filicide-suicide: Common factors in parents who kill their children and themselves. Journal of the American Academy of Psychiatry and the Law, 33(4), 496–504.
Hatters Friedman, S., & Resnick, P. J. (2007). Child murder by mothers: Patterns and prevention. World Psychiatry, 6(3), 137–141.
Healy, D., Herxheimer, A., & Menkes, D. B. (2006). Antidepressants and violence: Problems at the interface of medicine and law. PLoS Medicine, 3(9), e372. https://doi.org/10.1371/journal.pmed.0030372
Mikolajczak, M., Brianda, M. E., Avalosse, H., & Roskam, I. (2018). Consequences of parental burnout: Its specific effect on child neglect and violence. Child Abuse & Neglect, 80, 134–145. https://doi.org/10.1016/j.chiabu.2018.03.025
Mikolajczak, M., Gross, J. J., & Roskam, I. (2019). Parental burnout: What is it, and why does it matter? Clinical Psychological Science, 7(6), 1319–1329. https://doi.org/10.1177/2167702619858430
Mikolajczak, M., & Roskam, I. (2018). A theoretical and clinical framework for parental burnout: The balance between risks and resources (BR2). Frontiers in Psychology, 9, Article 886. https://doi.org/10.3389/fpsyg.2018.00886
Moore, T. J., Glenmullen, J., & Furberg, C. D. (2010). Prescription drugs associated with reports of violence towards others. PLoS ONE, 5(12), e15337. https://doi.org/10.1371/journal.pone.0015337
Okun, M. L. (2015). Sleep and postpartum depression. Current Opinion in Psychiatry, 28(6), 490–496. https://doi.org/10.1097/YCO.0000000000000198
Pearlin, L. I., Mullan, J. T., Semple, S. J., & Skaff, M. M. (1990). Caregiving and the stress process: An overview of concepts and their measures. The Gerontologist, 30(5), 583–594. https://doi.org/10.1093/geront/30.5.583
Sharma, T., Guski, L. S., Freund, N., & Gøtzsche, P. C. (2016). Suicidality and aggression during antidepressant treatment: Systematic review and meta-analyses based on clinical study reports. BMJ, 352, Article i65. https://doi.org/10.1136/bmj.i65
Xu, M., Luo, Y., Huang, Y., Liu, Y., & Ding, L. (2026). Risk factors for postpartum depression: An umbrella review. Frontiers in Public Health. https://doi.org/10.3389/fpubh.2025.1714668
Zarit, S. H., Reever, K. E., & Bach-Peterson, J. (1980). Relatives of the impaired elderly: Correlates of feeling of burden. The Gerontologist, 20(6), 649–655. https://doi.org/10.1093/geront/20.6.649