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At SPI Investigations we focus on private investigation cases from Grand Rapids and the entire Michigan region.

Who We Are

SPI Investigations

SPI Investigations is a private investigation company based in the Grand Rapids Michigan area. The owner SPI Investigations worked for the Grand Rapids Police Department for 30 years. Over 20 of those years was spent in a specialized unit working undercover utilizing surveillance and investigative techniques on a daily bases. Prior to retirement from the Police Department he was one of the most decorated officers in their history and was nominated for police officer of the year in 2009 and again in 2010 when he was awarded the honor.

SPI Investigations is located in the Grand Rapids Michigan area, and we serve mainly the Southwestern Michigan area, but are willing to travel if the need arises. At SPI we put the client’s needs first. We strive to obtain the most cost-effective results for our private, legal and insurance clients. We provide only the highest quality professional services for our clients. Call around other agencies and you will see how our prices compare. At SPI we fully understand and honor your right to privacy during an investigation. We understand that dealing with a personal issue can be difficult, so we offer a free consultation to discuss your case.

Our Services

Services We Provide

Protection of Personal Affairs

At SPI we value your privacy and are committed to protecting your personal affairs.

GPS Tracking and Equipment

SPI offers GPS tracking for all your needs so you can see their location on a map anytime. We also offer security equipment such as cameras and alarms to help protect your home or office.

Protection of Business Affairs

SPI also offers protection for your business affairs. You can’t put a price on peace of mind, but we can help you find the coverage you need at a price you can afford. We also offer a variety of other services to help protect your business.

how it works

Service Process

We are in business for one reason: to solve your issues swiftly and quietly. You need SPI if you want the truth.

Choose Your Service

At SPI, we offer a variety of services to meet your needs. Whether you are an individual or a business, we have the resources and expertise to help you.

Make An Appointment

If you want to uncover the truth, make an appointment with SPI today. We offer free initial consultations, so you have nothing to lose.

Pay For Your Service

Once you have decided on the service you need, pay for it online. We accept all major credit cards and PayPal.

Investigation Begins!

Once your payment is clear we start working on your case to discover the truth. We will keep you updated every step of the way.

Need Help

Feel free to call or email for pricing and rates anytime.

why choose us

We Are Qualified & Professional

Locate Missing Persons

There are times when finding someone can be difficult, and in those cases, you may need to hire a private investigator.


There is no denying the truth when it is caught on tape. If you suspect your spouse or partner of cheating, videotaped evidence is the best way to catch them in the act and get the proof you need.


If you're looking for a reliable background check in Michigan, look no further! As licensed private investigators in the state, we are more than qualified to handle your case.


Whether you're involved in a case or just considering one in Michigan, Asset Searches might provide crucial information about the person you're suing or planning to sue.

We Ready 24 Hours For You

Our Protection Is Always There 24 Hours

SPI has a longstanding commitment to excellence and professionalism, which has earned us a stellar reputation among those we serve. We are dedicated to setting the standard of excellence in the private investigation industry in Michigan. No matter what problem you’re up against, we have the Michigan private investigator that can help!

Write A Review

Our Testimonials

Responsive & Professional

September 12, 2023

I would highly recommend SPI Agency for all my investigative needs!

-Quick response

-Very thorough

-Accurate & Reliable

-Courteous & easy to work with

-Listens with empathy

-Navigates your actual needs of service for your cost effectiveness… I would hire him again 100% if needed…

Shannon V

Extremely Attentive

August 3, 2023

Mr. Stanton has been one of the easiest PI’s I have had the pleasure of working with over the last 20 years as a legal assistant. He has always been very responsive and very thorough.

Jenea P.

Wonderful experience - very thorough, professional and understanding

July 29, 2023

Wonderful experience during a tough time. I knew I could count on Robert and his expansive expertise in the field. Robert was very thorough, understanding, thoughtful and friendly. It’s wonderful to work with someone like him and would definitely call on him in the future. Thank you –


Very Pleased

July 24, 2023

I don’t normally do reviews b/c of time constraints, but I am taking the time to do this one. Robert is great. Very responsive, understands the emotions behind those sensitive topic, and thorough. We had a safety concern and Robert addressed it quickly. The next week we had a different issue and he crushed that!


Would hire again 100%!

July 21, 2023

SPI went above and beyond on my case. Very professional, efficient and effective in what I was looking for. Robert’s professionalism and attention to detail is top notch and I am very happy that I had him on my case. I will definitely use him in the future if needed to find out the facts!

Chad Snyder


July 17, 2023