Private investigation, polygraphs, locating people or property, and serving paperwork throughout the Pacific Northwest

Hamre PI is one of the leading private investigation and polygraph firms in Washington State. Our team is here to listen to your story and provide advice on how we can help you move forward with your individual situation. We've helped countless families and individuals find lost relatives, get answers to their suspicions, find missing and stolen property, and so much more. Each of our polygraphs and investigations are completely discreet and within the comfort level of our clients to ensure the safety and security of each of our clients.

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Our clients

Private citizens

Anyone can use our services. We offer investigation, lie detector tests, location of property, location of missing persons, serving paperwork, and so much more.

Attorneys & Police

Attorneys and police investigations frequently use our services to find individuals, uncover evidence, complete polygraph tests, and testify in trials.

Businesses

We can even help businesses that experience theft and fraud, insurance claims, embezzlement, corporate espionage, and more to get the answers they need.

Our professional services

Finding the truth 24/7

Client Reviews

Jason D.
Polygraph client
Hamre PI saved my marriage with a lie detector test. I'm so glad I trusted them to help me prove my innocence.
Jeffrey F.
Stolen property client
My work van, along with my construction equipment inside, was stolen from outside my business. Steve helped me find the guy who did it and I got most of my equipment back. I highly recommend using Hamre PI for any of your private investigation needs.
Debra J.
Locate distant relative client
I couldn't believe he was able to find my real dad. Now my father and I are finally building a relationship. Best decision I ever made.
Sandra m.
Serving papers client
I'm really glad I chose Hamre PI. I didn't have anyone who could serve my divorce papers to my ex. They sent a guy to my ex's place to serve the papers and it went off without a hitch.

Reunite with loved ones

We've helped countless families find their missing relatives. Whether they wandered away from caretakers or moved away long ago, Hamre PI can help track down missing persons, distant relatives, biological parents or children, and old friends.

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Our process

Each case at Hamre PI is unique and brings its own challenges. The process below is a general outline of what an investigation looks like. Find more detailed information about our investigative process.

Private & confidential chat

to understand your unique situation.

Recommendations

for an actionable plan moving forward.

The Investigation

to understand your situation.

Report on Findings

to give you the answers you need.

FAQ

What is a private investigator?

Private investigators (also known as private detectives and private eyes) are licensed professionals who discreetly collect evidence and perform research to discover information for their clients. Private investigators can work for private citizens, businesses, law enforcement, and attorneys and can be useful for many cases such as spousal infidelity, child custody, theft, missing persons, fraud, serving subpoenas, and much more.

What do private investigators do?

Private investigators perform a wide variety of services including searches, surveillance, serving subpoenas, taking statements, testifying in court, and more. Our clients often hire our private investigators to investigate cheating spouses, corporate or insurance fraud, child abuse, child custody, worker's compensation claims, and so much more.

What is the difference between surveillance and investigation?

Surveillance includes following, observing, and collecting information about a person, business, or place without the subject knowing. Investigations can include surveillance and can also include interacting undercover with the subject to gain more information. The goal of surveillance is to discreetly collect evidence, whereas the goal of an investigation may be to obtain confessions of guilt or catch the subject in wrongdoing.

Are private investigators licensed?

Yes, all private investigators in the State of Washington must obtain a license to operate within the state.

What is a polygraph test?

A polygraph test (also known as a lie detector test) is a test that measures physiological stress indicators in response to answering questions. Polygraph tests are used by private citizens, law enforcement, and employers to get a general idea if someone may be truthful or deceptive when answering a pre-set series of questions. Polygraph tests have multitude of uses including but not limited to interrogations, screening new employees, spousal infidelity, and divorce.

How does a polygraph work?

A polygraph works by recording stress indicators such as blood pressure, pulse, respiration, and skin conductivity while the subject answers a series of questions. For most test subjects, physiological reactions while answering either point to deceptive or non-deceptive answers.

Do you suspect infidelity?

Infidelity is a tough issue in relationships. Get the answers you need with a polygraph test (lie detector test). Our services are private and discreet and can be completed in the client's home.

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Serving clients internationally

While we are located in Washington, our cases regularly cross state lines, borders, and require air travel. We serve clients throughout the USA and our private investigators can travel internationally.

About us

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 have experience working with criminal cases, missing persons, spousal infidelity, missing and stolen property, and so much more. Each of our services are safe and confidential for our clients and our investigators are trained to handle cases professionally and with attention to detail.

Find out more

Private Investigation & Polygraph Services

Private Investigators Serving Washington & the Pacific Northwest

Clarity when the truth matters.

Confidential investigative and polygraph services for individuals, attorneys, and businesses. Get the facts, protect what matters, and move forward with confidence.

Talk to an investigator »Our Services

All inquiries are confidential.

30+ Years Experience

Trusted across the Pacific Northwest.

Confidential & Discreet

Your privacy is our priority.

Available 24/7

Real people. Always on call.

Washington-based

Serving the entire Pacific Northwest.

Experience Matters

More than 30 years of investigative experience.

For more than three decades, Hamre PI has helped individuals, attorneys and businesses find answers when reliable information matters.

From sensitive personal situations to complex legal and business investigations, our work is grounded in discretion, careful investigation and clear communication.

Every case is different. We take the time to understand what you need to determine, evaluate the information available and recommend an investigative approach appropriate to the circumstances.

30+ Years

of Investigative Experience

Individuals, Attorneys & Businesses

Investigative support for a wide range of clients.

Pacific Northwest

Local knowledge. Regional reach.

24/7

Available when situations can't wait.

Testimonials

Trusted by those who need answers.

"Hamre PI handled a senstive situation for me with complete professionalism. They were responsive, discreet, and got the answers I needed."

- Private Client, Washington

"Accurate, professional, and easy to work with. I highly recommend Hamre PI for anyone needing investigative services."

- Legal Professional, Seattle

"In a difficult time, Hamre PI gave me clarity and peace of mind. Their discretion and communication were outstanding."

- Business Client, Washington

Our Process

A clear, confidential process.

You don't need to arrive knowing exactly what kind of investigation you need. We start with the situation, determine what information may be obtainable, and develop an appropriate path forward.

Confidential Consultation

Tell us what's happening and what you need to determine. We'll listen, ask relevant questions and discuss the information you already have.

Investigative Plan

We evaluate the available information and recommend an approach based on your objectives and the circumstances of the case.

Investigation

We conduct the investigative work using the methods appropriate to the case and keep you informed when appropriate.

Findings & Next Steps

You receive the information we've developed and a clear understanding of what was found and what options may come next.

Confidential

Your situation stays private.

People contact private investigators during some of the most personal, difficult and uncertain situations in their lives. You may be dealing with a suspicion you haven't shared with anyone, a sensitive legal matter, a business problem or a question you simply need answered.
Your initial conversation is an opportunity to explain the situation privately and determine whether Hamre PI is the right resource for your needs.
We approach personal, legal and business matters with discretion and respect for the sensitive information involved.

Private Investigation & Polygraph Services

Private Investigators Serving Washington & the Pacific Northwest

Clarity when the truth matters.

Confidential investigative and polygraph services for individuals, attorneys, and businesses. Get the facts, protect what matters, and move forward with confidence.

Talk to an investigator »Our Services

All inquiries are confidential.

30+ Years Experience

Trusted across the Pacific Northwest.

Confidential & Discreet

Your privacy is our priority.

Available 24/7

Real people. Always on call.

Washington-based

Serving the entire Pacific Northwest.

Our Services

Professional. Discreet. Results.

From personal concerns to complex legal and business matters, we provide investigative services designed to help you get reliable information and determine what comes next.

View All Services »

Private Investigation

Personal, legal and business investigations designed to uncover the facts you need.

Polygraph Testing

Professional polygraph examinations for specific questions, allegations and disputes.

Surveillance

Discreet observation and documented evidence for personal, legal and business matters.

Locate a Person

Locate relatives, witnesses and other individuals who have become difficult to find.

Recover Property

Investigate missing, stolen or concealed property and develop information about its location.

Legal Process Serving

Reliable service of legal documents with clear documentation of service.

When You Need Answers

Not sure if you need a private investigator?

You don't need to know which investigative service to ask for. Tell us what's happening and what you're trying to determine. We'll help you understand what can realistically be investigated and whether professional assistance makes sense.

Suspected Infidelity

Discreetly investigate concerns about a spouse or partner and document relevant activity.

Missing or Estranged Person

Develop current information about a relative, friend, witness or other hard-to-find individual.

Theft or Fraud

Investigate suspected theft, fraud, missing property or dishonest activity.

Child Custody Concerns

Gather and document relevant information when a child's safety or welfare may be at issue.

Legal or Criminal Matter

Investigative support for attorneys, individuals and others involved in civil or criminal matters.

Hidden Property or Assets

Develop information about property or assets that may be missing, concealed or difficult to trace.