New York forensic evaluations — Frye, not Daubert.

Frye + Wesley + Parker.

New York applies the general-acceptance test from Frye v. United States, 293 F. 1013 (D.C. Cir. 1923), confirmed and applied in People v. Wesley, 83 N.Y.2d 417 (1994). Novel scientific evidence is admissible if it is generally accepted as reliable in the relevant scientific community. Established methodology does not require an ongoing Frye hearing — the burden of demanding one falls on the party challenging admissibility for new techniques or applications.

Parker v. Mobil Oil Corp., 7 N.Y.3d 434 (2006), added a reliability gloss that operates within the Frye framework: even where general acceptance exists, foundation problems — speculative inferential chains, missing causal links, methodologically flawed application — can independently support exclusion. The reliability inquiry in New York is narrower than Daubert but is not nothing.

For forensic psychology specifically, the Frye framework most often surfaces around novel instruments, novel applications of established instruments, or emerging methodologies (for example, debates over the admissibility of certain risk-assessment tools or specific malingering measures). Established forensic instruments typically don’t trigger a Frye hearing, but the methodology behind their application can still be challenged on Parker-style foundation grounds.

New York competency procedure.

Article 730 of New York’s Criminal Procedure Law governs competency. The substantive standard remains Dusky, with Article 730’s procedural overlay: two examiners are appointed (typically one psychiatrist and one psychologist, or two psychiatrists), the examination is conducted at the request of the court, and findings are reported to the court for adjudication of fitness. The two-examiner structure is distinctive and shapes how the report is written — substantial agreement on the finding is the norm, and significant disagreement triggers further procedure.

CPL § 730.40 governs commitment to the Office of Mental Health for restoration when the defendant is found unfit. Restoration proceeds with periodic reassessment; the constitutional limits from Jackson v. Indiana, 406 U.S. 715 (1972), apply to New York commitments as elsewhere.

See the CST evaluation page for the substantive analysis. ForensicShield’s review applies the New York-specific procedural overlay (two-examiner structure, Article 730 timing, OMH commitment framework) when the venue is indicated.

New York’s insanity defense.

New York Penal Law § 30.05 articulates an M’Naghten-derived test: a person is not criminally responsible if, at the time of the conduct as a result of mental disease or defect, the person lacked substantial capacity to know or appreciate either the nature and consequences of the conduct or that the conduct was wrong. The defense bears the burden by a preponderance. CPL § 220.15 governs notice-of-defense procedure.

Procedurally, post-acquittal commitment is governed by CPL § 330.20, with classification of the defendant as “dangerous mentally ill” (track 1) or with mental illness but not currently dangerous (track 2) driving the commitment outcome. The classification has substantial downstream consequences and is itself a focus of evaluator opinion in many cases.

New York’s sex offender management framework.

New York’s sexually violent predator framework is the Sex Offender Management and Treatment Act (SOMTA), codified at Mental Hygiene Law Article 10. SOMTA was enacted in 2007 and has been litigated extensively in the years since. Procedurally, it requires (1) a case-review team determination, (2) psychiatric examination, (3) probable-cause hearing, (4) trial on the question of whether the respondent is a detained sex offender suffering from a mental abnormality, and (5) a separate disposition hearing on commitment vs. strict and intensive supervision and treatment (SIST).

State v. Donald DD., 24 N.Y.3d 174 (2014), and its progeny clarified that a diagnosis of antisocial personality disorder alone is insufficient to establish a mental abnormality under Article 10. SOMTA evaluations must establish the connection between a qualifying diagnosis (or specific cluster of conditions) and the predicted future conduct — a methodologically specific requirement that ForensicShield’s review checks against current case law.

See the psychosexual evaluation page for the substantive methodology. The New York overlay adds Article 10 procedural posture, the SIST alternative, and the Donald DD. diagnostic-foundation requirement.

New York custody evaluation framework.

New York custody analysis sits on top of Domestic Relations Law § 70 and § 240, which apply the best-interests-of-the- child standard without an enumerated factor list — the factors come from case law. Eschbach v. Eschbach, 56 N.Y.2d 167 (1982), and subsequent decisions identify the non-exclusive factors New York courts weigh. Forensic custody evaluations operate against this case-law-driven standard rather than against a statutory checklist.

Relocation cases are governed by Tropea v. Tropea, 87 N.Y.2d 727 (1996), which articulates the multi-factor test for evaluating proposed relocation. A custody evaluator opining on a New York relocation matter without addressing the Tropea factors is in a different category of vulnerable than for non- relocation custody work.

See the child custody evaluation page for the substantive methodology. The New York overlay adds the Eschbach factor framework and the Tropea relocation test where applicable.

What gets attacked in New York reports.

• Frye-hearing trigger. Use of a relatively novel instrument or technique can prompt a Frye motion. The defending evaluator should be prepared to demonstrate general acceptance through peer-reviewed publication and use in the relevant community.
• Parker foundation challenges. Even with accepted methodology, opinions where the inferential chain is speculative are exposed under Parker’s reliability gloss within the Frye framework.
• Article 730 examiner agreement. When two examiners reach divergent fitness conclusions, attorneys may probe the reasoning gap and the data each examiner relied on.
• CPL § 330.20 classification. In post-NGI proceedings, the dangerous-mentally-ill vs. non-dangerous classification has major downstream consequences and is heavily litigated.
• Donald DD. diagnostic foundation. SOMTA evaluations must establish a sufficient diagnostic basis for mental abnormality — antisocial personality alone does not suffice.
• Eschbach factor coverage. Custody opinions that don’t address the case-law factors New York courts apply are vulnerable to a foundation attack.
• Tropea factors. Relocation analysis that doesn’t track the controlling test is a discrete vulnerability.

What ForensicShield checks for New York-posture reports.

• Frye general-acceptance is applied as the admissibility frame for novel methodology, with Parker reliability gloss for foundation issues
• CPL Article 730 procedural overlay is checked (two-examiner structure, OMH commitment framework)
• Penal Law § 30.05 insanity standard is applied; CPL § 220.15 notice and CPL § 330.20 classification are flagged when relevant
• Mental Hygiene Law Article 10 (SOMTA) procedural posture and the Donald DD. diagnostic-foundation requirement are checked for SVP work
• Eschbach factor coverage is surfaced for custody reports; Tropea factors are flagged when relocation is at issue
• New York Court of Appeals and Appellate Division authority is surfaced with verified citations

Other jurisdiction-specific guides.

See the federal jurisdiction page for FRE 702 / Daubert practice in federal court, and the California jurisdiction page for the Kelly/Sargon hybrid framework in California state court. The same substantive evaluation pages apply across jurisdictions with state-specific overlays: competency, criminal responsibility, violence risk, psychosexual / SVP, custody.