Forensic Psychiatry
Medical Precision.
Legal Fluency.
Trial Readiness.
Lamoureux Forensic and Psychiatric Services is a boutique forensic psychiatry practice providing rigorous, objective psychiatric evaluation and consultation for complex litigation.
Attorney InquiryWhy LFPS
Rigor Under Scrutiny.
LFPS is a founder-led forensic psychiatry practice with differentiated areas of focus across its physicians, allowing matters to be matched thoughtfully to the appropriate expertise.
We approach every matter with the understanding that our clinical findings must withstand rigorous cross-examination. Founded on extensive clinical experience and specialized forensic training, LFPS delivers clear, defensible, and medically sophisticated psychiatric analysis.
Based in Arizona, our practice serves counsel, courts, and institutions in civil, criminal, probate, family law, and administrative matters across multiple jurisdictions.
Founder-Led Structure
Directed by Ian C. Lamoureux, M.D., ensuring consistent forensic standards across all associate evaluations.
Objective Methodology
Adherence to evidence-based psychiatry and established forensic guidelines, free from advocacy bias.
Strategic Case Assessment
Providing counsel with clear-eyed assessment of the clinical and forensic strengths and vulnerabilities of the case early in the matter.
Core Competencies
Practice Areas
Criminal Responsibility
Rigorous evaluation of mental state at the time of the offense, applying jurisdiction-specific legal standards to complex clinical presentations.
Learn moreTraumatic Brain Injury
Objective assessment of the psychiatric and neurocognitive sequelae of head trauma, distinguishing organic pathology from functional overlay.
Learn moreTestamentary Capacity
Retrospective analysis of cognitive and psychiatric functioning to determine capacity at the time of estate document execution.
Learn moreUndue Influence
Evaluation of psychological vulnerability and susceptibility to coercion in contested probate and elder law matters.
Learn moreEmotional Damages
Evidence-based assessment of alleged psychological injury, focusing on causation, prognosis, and the differentiation of pre-existing conditions.
Learn moreMental Health Causation
Systematic analysis of the causal relationship between specific events and subsequent psychiatric pathology.
Learn moreMental Health Nexus
Evaluation of the connection between an individual's diagnosed psychiatric condition and specific legally relevant behaviors or outcomes.
Learn moreDeath Penalty
Comprehensive psychiatric evaluation for capital mitigation, addressing complex developmental, neurobiological, and clinical factors.
Learn moreMalingering Assessments
Sophisticated, data-driven evaluation of symptom validity and the intentional feigning or exaggeration of psychiatric illness.
Learn moreMass Torts
Scalable, consistent psychiatric assessment and consultation for complex, multi-plaintiff litigation.
Learn moreFamily Law, Parent-Child, and Child-Adolescent Consultation
Forensic psychiatric consultation in matters involving children, adolescents, and families, with board-certified child and adolescent psychiatric expertise.
Learn moreCapacity, Guardianship & Conservatorship
Psychiatric evaluation of cognitive and clinical capacity for guardianship, conservatorship, and related vulnerable adult proceedings.
Learn moreThe Practice
Experts
Founder & Principal
Ian C. Lamoureux, M.D.
Dr. Lamoureux directs the practice's forensic and clinical work, bringing substantial experience and forensic rigor across administrative, civil, criminal, probate, and family law matters.
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Associate
Bruno Perossa, M.D.
Dr. Perossa, based in Minnesota, provides forensic consultation in family law and child psychiatric matters, with board-certified expertise in child and adolescent psychiatry, developmental context, and parent-child dynamics.
Associate
Regan O'Brien, M.D.
Dr. O'Brien brings consult-liaison psychiatry experience to probate and guardianship matters, with expertise in capacity assessment and the careful integration of psychiatric and medical findings in the formulation of opinions.
For Counsel
Strategic Consultation and Objective Psychiatric Assessment.
We encourage counsel to contact LFPS early in the matter, including before formal expert retention, when an initial psychiatric case assessment may be helpful. Early consultation can help clarify the relevant clinical and forensic issues and inform decisions regarding retention and case development.