International Research Group, Inc.

General Investigations   |   Financial Investigations   |   Forensic Accounting

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About IRG

IRG Logo International Research Group, Inc. is a general investigative, financial investigative and forensic accounting firm that has been serving the needs of individuals, industry and the legal profession for almost 20 years. IRG was founded by former agents of the U.S. Treasury Department and Federal Bureau of Investigation . IRG professionals have an average of thirty years experience and are recognized experts in their respective fields.

IRG investigators and forensic accountants are uniquely experienced in the investigation, preparation and presentation of complex cases. IRG principals all have extensive courtroom experience. IRG is singularly qualified in the investigative area and brings with it experience, discretion and professional judgment unmatched by other firms.


IRG provides investigative services for some of the largest law firms in the United States. IRG also serves government institutions, privately held companies, Fortune 500 companies and individuals.


Investigative Services

IRG specializes in the investigation of financial irregularities and fraud. Our unique experience and training allows us to examine financial data and provide a complete analysis of the issues.

    • General Investigations
    • Fraud and Financial Investigations
    • Forensic Accounting
    • Security Consulting
    • Due Diligence
    • Executive Screening
    • Surveillance
    • Computer Forensics
    • Executive Protection
    • TSCM (de-bugging)

Litigation Support Services

IRG professionals understand the intricacies involved in gathering, organizing and preparing evidence for use in the courtroom.

    • Analysis of Financial Records
    • Witness Location and Interview
    • Review of Discovered Documents
    • Deposition Research
    • Preparation/Presentation of Trial Charts and Summaries
    • Questioned Document Analysis


IRG investigators and forensic accountants are all former federal agents who have received years of extensive specialized training in investigative procedures and forensic accounting. IRG maintains close affiliations with a network of former federal agents who are strategically located across the United States and in many foreign countries. IRG’s professional staff is supported by sophisticated research systems.

IRG’s professional staff coordinates each confidential investigation from start to ultimate disposition, providing decisive and timely response to the needs of our clients.

Richard N. Rosfelder, Jr., MBA

Rich Rosfelder - photo A special agent with the U.S. Treasury Department for 25 years, Mr. Rosfelder coordinated investigations of complex international financial fraud, money laundering and corruption for the U.S. Department of Justice Organized Crime Section from 1977-1988 and for the U.S. Attorney’s Office in Cleveland, Ohio, from 1988-1995.
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Richard A. Wrenn

Dick Wrenn - photo A special agent with the Federal Bureau of Investigation for 31 years, Mr. Wrenn specialized in personal and property crimes. Mr. Wrenn received extensive training and was assigned to coordinate cases involving “Crimes Against Children” in the Cleveland Division. Mr. Wrenn was a senior member of the FBI’s Critical Incident Negotiating Team, a national resource responsible for the management of federal crisis incidents.
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J. Douglas Hofherr

Doug Hofherr - photo A special agent with the Federal Bureau of Investigation for 30 years, Mr. Hofherr specialized in financial fraud, white-collar criminal cases and property crimes. He successfully investigated crimes involving multimillion dollar frauds against the government, bribery and corporate corruption. Mr. Hofherr has been an instructor for the FBI.
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Anthony S. Corwon, CPA

Tony Corwon - photo A special agent and supervisor with the U.S. Treasury Department for 28 years, Mr. Corwon conducted and coordinated investigations centering upon financial fraud and money laundering. Mr. Corwon has been an instructor at the Federal Law Enforcement Training Center, Ashland College, and has conducted money laundering seminars for state and local law enforcement.
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David A. Lyons, CFE, MBA

Dave Lyons - photo A Special Agent with the Federal Bureau of Investigation for 22 years, Mr. Lyons was assigned to investigate complex financial fraud including financial institution fraud, Ponzi schemes, mail and wire fraud, insurance fraud, public corruption and computer fraud. He spearheaded the development of the FBI’s National InfraGard Program. Following his FBI career, Mr. Lyons was a Vice President with KeyBank, where he led the Background Investigations Unit and the Fraud Detection & Risk Analysis department. Mr. Lyons is a Certified Fraud Examiner and CPA (inactive status).
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IRG maintains close affiliations with a network of former federal agents who are strategically located across the United States and in many foreign countries. IRG maintains affiliations with:

Society of Former Special Agents of the FBI

Society of Former Special Agents of the FBI - LogoThe Society of Former Special Agents of the FBI, established in 1937, is a fraternal, educational and community-minded organization composed of former FBI Special Agents who served with Fidelity, Bravery and Integrity in defense of America. THE MISSION of the Society is to promote the welfare of its members, preserve the friendships and the loyalties achieved while Special Agents of the FBI and to support the FBI and law enforcement as positive forces in American society.

Association of Former Special Agents of the IRS

Association of Former Special Agents of the IRS - LogoThe Association of Former Special Agents of the Internal Revenue Service was formally established in 1988 and is a fraternal organization made up of former special agents of the IRS – Intelligence Division and Criminal Investigation Division.

Council of International Investigators

Council of International Investigators - LogoThe Council of International Investigators (CII) is well respected international association of professional private investigators. CII was established over 50 years ago and has about 300 members worldwide. Each private investigator or private detective belonging to this organization meets strict membership criteria in line with CII’s aim of maintaining the highest quality professionals within the private investigation business.

Federal Criminal Investigators Association

Federal Criminal Investigators Association - LogoSince 1953, the Federal Criminal Investigators Association (FCIA) has served the needs of the federal investigative community. The mission of FCIA is to ensure that Federal Law Enforcement Professionals have the tools and the support network to meet the challenges of future criminal investigations while becoming more community oriented.

ASIS International

ASIS Member LogoASIS International is the preeminent organization for security professionals. Founded in 1955, ASIS is dedicated to increasing the effectiveness and productivity of security professionals by developing educational programs and materials that address broad security interests, such as the ASIS Annual Seminar and Exhibits, as well as specific security topics.


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Contact Info

Phone (440) 333-6602


(440) 771-9990


Address Cleveland, Ohio 44116