Capable private investigators are revealed by their ability to effectively resolve uncertain matters.

Moral authority matters in the courtroom. It matters a lot. Professor Gregory Gilbertson has earned the respect of judges, prosecutors, and attorneys alike for nearly three decades of service as a police officer, college professor, international police trainer, Guardian ad Litem, private investigator, and expert witness in excessive force, police misconduct, and self-defense.

Academic Service: As a tenured criminal justice professor with nearly two decades of college and university teaching experience, Gregory Gilbertson has been employed by Centralia College since September 1, 1999. He was awarded tenure by college trustees on March 15, 2002. In addition, Professor Gilbertson has been certified by the Washington State Board for Community and Technical Colleges as an instructor in the field of Criminal Justice for 17 years.

As a senior faculty member and full professor at Centralia College, Gregory Gilbertson recently spearheaded a groundbreaking initiative for police officers, deputy sheriffs, and state troopers in Washington State. This initiative makes Centralia College the first college or university approved by the Northwest Commission on Colleges and Universities to award 45 credits to working police officers, deputy sheriffs, and state troopers for their basic law enforcement academy training and work experience. In addition, Professor Gilbertson has designed, developed, and authored 20 individual criminal justice and criminal investigation courses.

In addition to teaching at Centralia College, Professor Gilbertson has instructed hundreds of criminal justice courses for Saint Martin’s University (11-years), Brandman University (6-years), and South Puget Sound Community College. Furthermore, in August 2013 he was the recipient of the Brandman University Distinguished Faculty Award.

Professor Gilbertson is also a member, academic member, or associate member of the following organizations:

  • International Association of Chiefs of Police
  • Washington Association of Legal Investigators
  • Washington Association of Criminal Defense Lawyers

International Service: Professor Gilbertson is the only college or university professor in America who deployed to both Afghanistan and Iraq as an international police trainer during time of war. To qualify for deployment, he was twice vetted by the U.S. Department of Justice and U.S. Department of State as a subject matter expert in police practices and procedures.

Professor Gilbertson served 13 months in Kabul, Afghanistan during Operation Enduring Freedom.  As Senior Mentor and NATO Liaison to Commander of the Afghan National Police Academy, he was responsible for assisting the commanding general in all aspects of academy operations. Furthermore, he was responsible for coordinating and attending all academy staff meetings with NATO senior officers and international dignitaries.

During Professor Gilbertson’s tenure in Kabul, the Afghan National Police Academy encompassed 65 walled acres of gun-towers, classroom buildings, dormitories, motor pools, dining facilities, kitchens, administrative offices, athletic facilities, gardens and grounds. Founded in 1935, the Afghan National Police Academy is a part of the University of Afghanistan system. It is home to over 500 faculty, staff, and 2000 cadets pursuing their bachelor’s degree in police services.

As an integral component of his duties and responsibilities, Professor Gilbertson filed weekly reports with NATO regarding cadet instruction, curriculum development, and logistical requirements. These reports resulted in 50 million dollars of NATO funding for building renovation, capacity building, and curriculum enhancement projects.

Previously, Professor Gilbertson served 12 months in Iraq as an international police trainer and curriculum specialist during Operation Iraqi Freedom. In Iraq, he worked with a committee of senior Iraqi police officers (Colonels and Generals) to design and develop a bachelor’s degree for the Baghdad Police College. Upon completion of this project, Professor Gilbertson was named deputy director of the United Kingdom’s Basrah Training College. At Basrah, he supervised the training of 500 Iraqi police cadets by American, British, and Czech instructors. In recognition of his Basrah service, Professor Gilbertson was awarded the Czech Military Police Medal on May 17, 2006.

In Afghanistan and Iraq, Professor Gilbertson lived and worked with NATO forces in active war zones. His operational areas were attacked by insurgents and terrorists with firearms, car bombs, rockets, and mortars almost every day.

Police Service: Professor Gilbertson graduated from the Atlanta Police Academy with a 93% academic average. He was then assigned to Zone 3 Precinct as a patrolman for two years. While assigned to Zone 3, Professor Gilbertson routinely led his precinct in felony and misdemeanor arrests. He then transferred to the LaGrange Police Department where his assignments included senior patrolman, S.W.A.T., stakeout squad, superior court investigator and school resource officer. During his tenure with LaGrange, Professor Gilbertson accrued nearly 3000 hours of tactical training and operational experience. He also completed the following specialized courses:

  • V.I.P. Executive Protection
  • S.W.A.T. Certification, Georgia Public Safety Training Center
  • U.S. Army Military Police S.W.A.T. School, Fort McClellan, AL
  • S.W.A.T. Sub-machine Gun, Georgia Public Safety Training Center
  • Police Tactical Rifle, Georgia Public Safety Training Center
  • Police Tactical Shotgun, Georgia Public Safety Training Center
  • Criminal Procedures, Georgia Public Safety Training Center
  • Advanced Interviews & Interrogations I & II, Columbus State University

Professor Gilbertson was compelled to end his law enforcement career when duty related injuries led to the onset of osteoarthritis at age 37, resulting in multiple surgeries whereby he received two artificial joints and prosthetic leg implants. The physical limitations associated with these procedures precluded him from working as a police officer again.

Community Service: After leaving law enforcement, Professor Gilbertson completed the following professional development courses:

  • Guardian ad Litem Training & Certification, Pierce County Superior Court, Tacoma, WA
  • Mediation Training & Certification, Pierce County Center for Dispute Resolution, Tacoma, WA

He then served three years as a Guardian ad Litem and Parenting Investigator for the Pierce County Superior Court. During this time he was was also employed as a district security and intervention officer with the White River and Kent school districts before accepting a full-time teaching position with Centralia College.

Military Service: Prior to entering law enforcement, Professor Gilbertson served in the U.S. Army as a non-commissioned officer of infantry soldiers. He was then appointed to the U.S. Army Officer Candidate School (O.C.S.) at Fort Benning, Georgia. While attending O.C.S. he was elected president of his class and recognized as a Distinguished Military Graduate of his commissioning class at graduation. Lieutenant Gilbertson then attended Airborne School and served as an infantry platoon leader for several years. He received numerous awards and commendations as a commissioned officer before leaving the Army to become an Atlanta police officer.

Client Service: Professor Gilbertson has owned Gilbertson Investigations since August 2002. He specialized in criminal defense casework. He recently shifted the focus of his practice to expert witness work involving police misconduct and self-defense cases. To date, Professor Gilbertson has consulted with nearly 40 law firms and attorneys in 14 states as an expert witness on over 50 civil and criminal cases.

Media Relations: In addition to teaching and expert witness casework, Professor Gilbertson is a frequent contributor on criminal justice and law enforcement issues to NewsmaxTV, Gannet Newspapers,, the Associated Press, The Washington Post, “Celebrity Court”, and various newspapers throughout America.

University Degrees: Professor Gilbertson holds a Master’s degree in Justice Administration from Columbus State University, and a Bachelor’s degree in History from the University of Washington. He has also completed 30 credits of post-graduate coursework in criminal justice and public administration.

Summary: While Professor Gilbertson values all requests for expert witness or criminal defense casework, he does not accept every case. Professor Gilbertson carefully reviews the facts and circumstances of every case with retaining counsel before accepting or declining work. Furthermore, Professor Gilbertson does not accept non-attorney clients unless or until they are represented by a lawyer. 

Conclusion: Professor Gilbertson resides in Olympia, Washington with his lovely wife, Julie. He is available for expert witness casework anywhere in the United States. His experience, insight, knowledge, and analytical ability has helped dozens of attorneys and clients achieve positive outcomes for their clients, and he can help you too.

View Professor Gregory Gilbertson’s CV