Delivering thorough, discreet, and professional investigative services built on a foundation of law enforcement experience and a proven record of premier results.
Missouri PI License #2024008013
About
Donald S. Emmack brings decades of professional experience spanning law enforcement operations, intelligence analysis, and high-stakes consulting to every case. As a former POST-certified officer in both California and Missouri, he has served in command-level roles with deep expertise in operational planning and analytical methodology.
His investigative work focuses on defense investigations, insurance claims, and meticulous research — providing attorneys, insurance carriers, organizations, and individuals with the factual foundation they need to make informed decisions and build strong cases.
As Senior Vice President of RCC Consultants and RCC Ltd., Senior Consultant and Project Manager at The Warner Group (now Gartner Consulting), and Partner at ECG Inc., Donald has served domestic and international clientele, bringing a global perspective to complex investigative challenges.
Credentials
Services
Each engagement is handled with confidentiality, precision, and the disciplined attention to detail developed over a career in law enforcement and consulting.
Comprehensive investigative support for criminal defense attorneys and their clients. Independent fact-finding, evidence review, and case analysis to ensure every angle is examined and every right is protected. Experienced in both misdemeanor and serious felony matters.
Thorough research on individuals, businesses, and assets using lawful, professional investigative methods. Ideal for legal proceedings, due diligence, business vetting, and pre-litigation preparation. Results are documented, verifiable, and presented in a clear, usable format.
Skilled location of witnesses, victims, and persons of interest. Professionally conducted interviews designed to elicit accurate, reliable information. Versed in analytical interview methods and the legal requirements surrounding witness contact and statement collection.
Comprehensive investigative support for insurance carriers and Special Investigative Units (SIU). Services include claims validation, fraud detection, surveillance, and field investigations — delivering thorough, well-documented case work that supports accurate claims resolution and legal proceedings.
Professional Background
A distinguished career in law enforcement, academic achievement, and professional consulting provides the foundation for every OXYS Investigations engagement.
Served as a Watch Commander and Operations Officer. POST certified in California and Missouri. Deep experience in operational planning, field investigations, use-of-force, and command-level decision-making.
Extensive background in operational analysis and intelligence methodology. Expert understanding of use-of-force standards, policy application, and the translation of analytical findings into actionable outcomes for legal proceedings.
Senior Vice President of RCC Consultants and RCC Ltd., with additional roles as Senior Consultant and Project Manager at The Warner Group (now Gartner Consulting) and Partner at ECG Inc., a multi-state professional consulting practice — providing strategic advisory services to domestic and international clients in complex, high-stakes environments.
Support for insurance claims investigations and Special Investigative Unit (SIU) work for carriers. Services encompass claims validation, fraud detection, surveillance, and field investigation — producing thorough, well-documented case work that withstands legal and regulatory scrutiny.
Master of Public Administration (MPA) from the University of Southern California. Bachelor of Science from California Lutheran University. Adjunct Instructor at Drury University. Graduate of the Los Angeles Sheriff's Academy with advanced coursework across multiple law enforcement disciplines. Academic and professional credentials informing every investigation and analysis.
Contact
Consultations are confidential. Reach out to discuss your case or inquiry.
Missouri Licensed Private Investigator
License #2024008013