Special Agent David Landrum retired from the Internal Revenue Service in June 2001 after more than 27 years with the Criminal Investigation Division. David was assigned to the FBI Violent Crimes Task Force and the Department of Justice Organized Crime Drug Enforcement Task Force. As a member of these multi-agency units, he conducted investigations of money laundering activities by major drug trafficking organizations.

David is an expert in evidence analysis – both direct and circumstantial. He is able to recognize and document income, expenditures, liabilities and assets. He is experienced in the preparation of detailed and exhibited reports of investigation. His expertise includes the ability to corroborate or refute witness testimony and to develop all elements required by law to prove and disprove financial violations. He is experienced in the investigation of public corruption, tax fraud, and related matters.

David served as a long-term undercover agent with the IRS for ten years. He testified in federal and state court and before federal grand juries.

David prepared numerous cases for trial. He assisted government attorneys in obtaining indictments, drafting motions, plea negotiations, and the preparation of evidence for sentencing hearings. He conducted internal investigations for the IRS relating to Equal Employment Opportunity violations. David taught financial crime investigation techniques at the IRS Criminal Investigation Academy to students in the Basic, Advanced, and International Training Divisions.

Upon his retirement, David accepted a teaching contract with the IRS International Training Division at the Federal Law Enforcement Training Center. He taught financial investigation courses to law enforcement personnel in Bangkok, Thailand; Budapest, Hungary; Gaborone, Botswana; Abuja, Nigeria; and Sarajevo, Bosnia-Herzegovina.

David individually developed courses for the investigation of gangs and corruption. He also developed an accounting and money laundering course for police officers. David teaches these courses on an ongoing basis. His money laundering course was accredited by the Council on Law Enforcement Education and Training (CLEET) for use by Oklahoma law enforcement agencies and departments. David was a guest lecturer at an FBI seminar on Public Corruption.

David received numerous awards and letters of commendation from the Internal Revenue Service, United States Attorneys offices, police departments and the Director of the FBI.

David is a member of the Association of Certified Fraud Examiners. He is a member of the Federal Law Enforcement Officers Association, Oklahoma Gang Investigators Association and the National Native American Law Enforcement Officers Association. David holds a Bachelor of Science Degree in Accounting from Central Oklahoma State University (1976).

David is a licensed private investigator in the State of Oklahoma.  He is a Certified Money Laundering Specialist and a Certified Fraud Examiner.