Integrity Assessments Investigations
Attorney Resource Center
Private investigative services and EyeDetect® credibility assessment — exclusively for criminal defense counsel.
CJA Panel Vendor — S.D. Texas
Harris County Approved
Fort Bend County Approved
TX Lic. A19944401
Minority Women-Owned
◆ The Defense Investigator Advantage — HCCLA Presentation
Module 2 — Attorney Awareness Refresher
The Defense Investigator Advantage
How IAI Strengthens Your Criminal Defense Practice
Dr. Celvin G. Walwyn
Executive Director & Lead Investigator · Integrity Assessments Investigations · TX Lic. A19944401
Presented to the Harris County Criminal Lawyers Association
Who We Are
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CJA Panel Vendor
Southern District of Texas (Federal) — court-appointed counsel can retain IAI directly.
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Court-Approved Vendor
Harris County & Fort Bend County — tri-level court authorization for appointed defense.
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EyeDetect® Examiner
Converus-certified — next-generation credibility assessment. Not a polygraph.
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Licensed Private Investigators
Texas License No. A19944401 · Minority Women-Owned Business · Harris County, TX
What IAI Delivers for Defense Attorneys
Criminal Defense Investigations
Witness location & interviews, evidence gathering, crime scene analysis, and case timeline development — all documented for court.
EyeDetect® Credibility Assessment
Patented eye-tracking technology (Converus). Scientifically validated, non-polygraph credibility testing — admissible as defense evidence.
Subject Locate & Background
Locate witnesses, identify assets, uncover prior records, and verify facts — fast turnaround for active defense cases.
Expert Consultation
Law enforcement command-level expertise. Dr. Walwyn provides expert witness services and case strategy consultation.
EyeDetect® — The Science of Truth
POWERED BY CONVERUS · NOT A POLYGRAPH
Why EyeDetect® Matters to Defense Attorneys
Tracks involuntary eye movements — no human interpretation bias
Provides a Deception Probability Score (DPS) — objective, documented
Useful to support client credibility, rebut prosecution claims, or demonstrate truthfulness
Dr. Walwyn is a certified EyeDetect® Examiner (Converus) — PCSOT certified
Command-Level Expertise Behind Every Case
DR. CELVIN G. WALWYN
Executive Director & Lead Investigator
Retired International Police Commissioner — Federation of St. Kitts and Nevis
Retired USVI Deputy Commissioner of Police for Operations
Retired Texas Police Chief (2026)
Ph.D., Public Safety / Police Leadership — Summa Cum Laude with Highest Honors
Active TCOLE License · Certified EyeDetect® Examiner · PCSOT Certified
WHAT SETS IAI APART
38+ years law enforcement experience across 3 jurisdictions
Federal & State court-approved vendor
EyeDetect® — only non-polygraph credibility tool in region
Minority Women-Owned Business — MBE certified
Rapid response — Harris & Fort Bend County focus
How to Engage IAI on Your Next Case
01
Initial Consultation
Call or email to discuss case needs — no obligation. We assess the scope and provide a service estimate.
02
Engagement Letter
Attorney-client privilege protected. IAI operates under your direction as defense counsel.
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Investigation & Reporting
We conduct the work, document everything, and provide court-ready written reports and testimony if needed.
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CJA Panel Billing
Federal court-appointed attorneys — IAI is an approved CJA Panel Vendor. We handle the billing paperwork.
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◆ IAI Services for Defense Counsel
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Criminal Defense Investigation
Witness location & interviews, evidence gathering, crime scene analysis, and case timeline development — all documented for court.
👁️
EyeDetect® Credibility Assessment
Court-admissible credibility testing via Converus EyeDetect® technology. Not a polygraph — ocular-motor analysis with 86%+ accuracy.
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Subject Locate & Background
Locate witnesses, victims, and persons of interest. Comprehensive background investigations for defense strategy development.
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Expert Consultation & Testimony
Dr. Walwyn available as expert consultant — retired International Police Commissioner, USVI Deputy Commissioner, and Texas Police Chief (2026).
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PSI Review & Mitigation
Independent line-by-line review of Pre-Sentence Investigation reports — identifying errors, guideline miscalculations, and mitigating factors.
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Bilingual Field Investigation
Full investigative services in English and Spanish. No third-party interpreter. Conducted by our licensed bilingual investigator.
◆ Lead Investigator
Dr. Celvin G. Walwyn
Executive Director & Lead Investigator
Retired International Police Commissioner — St. Kitts & Nevis
Retired USVI Deputy Commissioner of Police for Operations
Retired Texas Police Chief (2026)
Ph.D. · Public Safety Leadership · Summa Cum Laude with Highest Honors
Certified EyeDetect® Examiner (Converus) · PCSOT Certified
Active TCOLE Master Peace Officer License
A.D. Walwyn, M.Sc.
Owner & Senior Investigator
Licensed Private Investigator (TX, since 2021)
M.Sc., Security Management
Certified EyeDetect® Examiner (Converus)
12 years — Harris County Corrections
Minority Women-Owned Business Owner
Earl A. Campbell, B.Sc.
Investigator
Licensed Private Investigator (TX)
B.Sc., Psychology · Mental Health Counseling
◆ Retain IAI