VETERAN-OWNED • WASHINGTON
Private Investigations
in Washington State
Sentinel Advisory Group provides personal injury investigations, surveillance, due diligence, and civil case support for law firms, businesses, and individuals throughout Washington State.
We use lawful investigative methods and legally obtained information to develop objective findings supported by written reports, video documentation, and relevant records.
Precision. Discretion. Results.
Military Intelligence Experience.
A Disciplined Investigative Approach.
Founded by Cory Ferris, a retired U.S. Army Special Forces Intelligence Sergeant, Sentinel Advisory Group applies experience in intelligence collection, analysis, and operational planning to civilian investigations.
This background supports a disciplined approach to investigative planning, verifying information, documenting objectively, and reporting clearly.
Investigative Services
Personal Injury Investigations
Factual investigations supporting personal injury matters, including activity verification, surveillance when appropriate, and objective documentation.
Surveillance & Documentation
Discreet, lawful surveillance to document observable activities, supported by photographic evidence, video recordings, and written reports when available.
Due Diligence & Investigative Research
Case-specific investigative research to verify information, examine relevant records, and identify facts warranting further inquiry.
Law Firm & Civil Case Support
Professional investigative assistance for attorneys handling civil matters, including fact development, records research, and organized case documentation.
Our Investigative Process
01
Consultation
Discuss the circumstances, available information, and questions the investigation needs to address.
02
Planning
Define the scope of work and select appropriate investigative methods.
03
Investigation
Conduct research and fieldwork, verify information, and document relevant findings.
04
Reporting
Present the findings and supporting materials, distinguishing observed facts from unresolved questions.
Discuss Your Investigative Needs
Provide a brief overview of your inquiry. We’ll discuss your objectives, determine whether our services are a good fit, and outline next steps.
Do not submit confidential evidence, Social Security numbers, medical records, or other highly sensitive information through this form. We can discuss arrangements for sharing sensitive materials after initial contact.
Your information will be used to review and respond to your inquiry. Please do not submit confidential case evidence, Social Security numbers, or other highly sensitive information through this form. See our Privacy Policy for details.