Private Investigation
& Polygraph Services

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Professional Private Investigation

Discreet and confidential professional private investigation services. 

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Polygraph/Lie Detection

Specializing in criminal and infidelity cases to get real answers.

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Private & confidential investigations and polygraphs

About our polygraph and investigative services

We provide safe, confidential services to our investigation and polygraph clients throughout all of Washington and Northern Oregon.

Our Process

A private and confidential conversation.

One of our investigators schedules a discussion to determine what type of services will be appropriate for your situation. This is a complimentary service and is guaranteed to be private and confidential, your safety and privacy are our first priorities.
Our investigator will need to ask you several questions about your specific circumstances. Having materials and information ready prior to this discussion helps to expedite the investigation process.


One of our investigators will discuss an action plan covering the next steps in the investigation process as well as a review of recommendations with the client. You will be provided with a written service agreement, and will be asked for a retainer/deposit.
After payment is received the work begins promptly and any further expenses to account for the needs of the investigation process will be discussed prior to depletion of retainer/deposit.

The Investigation

Our investigators have years of experience in safe, private surveillance. We make use of specialized techniques, photography, video, and specialized technology to get to the truth. Our investigators will travel throughout the region to tail suspects and conduct surveillance.

Time frame

Our promise is to remain diligent and results oriented throughout the entire investigation process. Our investigators give realistic time frames for each individuals unique circumstances in our recommendations. 

Investigations can last anywhere from a few hours to several years depending on the circumstances. Our investigators are committed to finding the truth, and accommodating the needs of our clients.

Reporting on Findings

A meeting is scheduled to report findings, present evidence, and discuss ongoing investigation needs or alternate forms of investigation that may be necessary. 

Our Confidential Investigation
& Polygraph Services

Polygraph Services Offered Greater Seattle Area

Polygraph/ Lie Detector

Our polygraph examiner has been utilized by local law enforcement agencies, attorneys, corporations, psychologists, and personal clients.
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We strive to obtain the facts for each of our clients with discretion and confidentiality in mind. Our investigations are private and discreet.
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Our investigators conduct covert surveillance on our subjects to protect your privacy and keep you safe. Contact us today about our legal surveillance options.
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Find a Person

Find a missing person, distant relative. Land ownership research. Serve subpoenas/court documents. Locate the whereabouts of a spouse.
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Confidential Investigation & Polygraph Testing for over 30 years.

For over 3 decades, Hamre PI has provided professional polygraph and investigative services to clients throughout the Pacific Northwest. Our investigators are experienced in covert surveillance and investigation techniques. We are dedicated to the safety and confidentiality of our clients while seeking the facts.

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Private Seattle Investigators
Contact One Of Our Investigators And Get The Truth 24/7.