Competency to Stand Trial in a Defendant with Fluctuating Cognition
Mr. R, 44, is charged with aggravated assault after a witnessed altercation outside a bar. He has a documented traumatic brain injury from a 2019 motor vehicle collision and a diagnosis of alcohol use disorder, currently in early remission (4 months). Over three interviews in a 10-day window, his performance varies markedly: on day 1 he names the charge and both attorneys but cannot describe the role of a plea; on day 5 he correctly explains plea bargaining, the adversarial nature of trial, and the consequences of a conviction, and he describes his attorney's strategy in accurate terms; on day 9 he again misidentifies the prosecutor as his own lawyer and says the judge 'works for the police.' He is currently on no psychotropic medication. Defense counsel asks you to opine on competency; the prosecution argues that because he 'can do it sometimes,' he is competent.
1. How should variability across evaluations be handled in a competency opinion, and what is the correct legal standard to apply?
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The governing standard is whether the defendant has sufficient present ability to consult with counsel with a reasonable degree of rational understanding and a rational as well as factual understanding of the proceedings (Dusky v. United States). The key word is present ability, assessed in relation to the proceedings he will actually face.
Variability is not itself dispositive in either direction. The examiner must determine whether the deficits are attributable to a mental disease or defect and whether they are stable enough to permit participation across the anticipated duration of a trial - not just in a single good interview. A defendant who can perform only intermittently, and whose floor of function includes misidentifying counsel and the court's role, is not reliably able to assist. The prosecution's 'he can do it sometimes' argument conflates capacity with consistency.
Recommended approach: (1) obtain collateral data on baseline and fluctuation (records, jail observations, family); (2) assess for reversible contributors - untreated withdrawal, delirium, sleep deprivation, pain, medication effects - and document whether a treatable condition is driving the variance; (3) consider repeat or extended evaluation and, if a reversible cause exists, recommend treatment and re-evaluation before opining; (4) state the opinion in functional terms tied to the Dusky prongs, and note the conditions under which he could become competent.
2. The court asks whether a treatable condition changes your recommendation. How do you reason about this?
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Distinguish restoration potential from present competency. If the fluctuation is plausibly driven by a treatable or modifiable factor (uncontrolled seizures, untreated mood disorder, substance withdrawal, medication side effects, sensory or language barriers), the appropriate recommendation is not a bare 'incompetent' but an opinion that identifies the deficit, its likely cause, and whether it is likely to respond to treatment within the statutory restoration period.
Practical points:
- Recommend specific evaluation and treatment (neurology re-evaluation for the TBI, seizure assessment, psychiatric medication review) and a defined re-evaluation interval.
- If the condition is not treatable and the deficits are durable, the opinion should say so, because that affects restoration prospects and long-term disposition.
- Avoid opining on the ultimate legal conclusion as if it were a medical fact; frame the opinion as the clinical predicate and let the court apply the standard.
- Document the limits of your data. An opinion rendered without knowing whether he is seizure-active or sleep-deprived is provisional.