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Marlin's Special Investigations MARLIN'S SPECIAL INVESTIGATIONS, INC. (MSI) is an Iowa Private Investigative Agency located in Cedar Rapids, Iowa. Established in 1994, MSI offers a wide variety of Investigative Services for Attorneys, Insurance Companies, Businesses, Private Individuals and other Private Investigative Agencies. Although we are located in Cedar Rapids, we work with clients all over Iowa and the entire U.S. Our investigators are licensed, bonded, and insured. The State of Iowa requires all private investigators be licensed by the Iowa Department of Public Safety.
Services
We are experienced in several areas of investigation, and you can read examples of our prior casework. MSI is experienced in criminal, civil and domestic legal matters and we have provided criminal defense investigations for both state and federal court matters. We have also conducted personal injury, workers' compensation, domestic surveillances and other civil investigations, providing video and still photographic evidence for use in domestic matters, such as divorces and child custody hearings.
Are GPS trackers legal in Iowa? Yes, they are legal for Iowa private investigators (PI) to use as long as it is for a legal and legitimate use. GPS trackers are unlawful and illegal to use by anyone if they are for the intent to stalk, intimidate, harm, annoy or alarm another person without a legitimate purpose.
Following his graduation from the University of Iowa in 1989, Jeff spent 3 years as a Kansas City metro area police officer. He then attended Central Missouri State University where he received a second degree in Mathematics Education and his teaching certification. He taught high school mathematics and coached football & basketball for four years in the state of Iowa.
Most states have at least one professional organization for private investigators, protective/security agents. These organizations help us work together, provide up-to-date education and training, and promote the highest standards of professional excellence.
Reviews (8)
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Patti Nguyen
May 27, 2021
I am beyond impressed with Jeff Marlin! He doesn't play around! I reached out to him earlier in the day, needing his process service. We had a quick phone conversation as to what I needed and the deadline we had to meet for the summons to be served. Three hours later, Jeff calls me back and tells me the person has been served! With my jaw dropped, I thanked him for his great work with completing the service.

Even in the midst of that part of Iowa recovering from a disastrous storm, he got the job done without a hitch! Best part of this experience was him telling me moment by moment how the person was served. I felt like I was there with him! Thank you again, Jeff! If anyone is looking for a process server, Jeff is your man! He will not disappoint!
Lindsay Larrabee Heabel
Jan 19, 2021
I have utilized the services of Marlin's Special Investigations since 1998 (23 years). My brother was murdered in Linn County, Iowa in 1998. After speaking with the law enforcement agency investigating his case, we met with our family attorney Jim Bradley, of Bradley and Riley. Our attorney told us that Marlin's Special Investigations was the best to help us find the truth and he was correct.

Still in shock, we did not know where to turn, nor who to trust. Jim knew that my brother and our family deserved justice, the investigative eyes of an independent professional with world class experience who would leave no stone unturned and also understood the law and had the ability to confidently navigate us through the process. Additionally, and most importantly, they were our advocate for my brother's voice who could no longer speak for himself.

I've retained Jeff's services for a multitude of jobs for myself and others which includes, but are not limited to, back-ground checks, surveillance, and security. What differentiates Jeff from other investigators is that he has professional experience in law enforcement, he is an excellent listener and takes the time to understand the goals his clients wish to accomplish by retaining his services.

He is willing to go the extra mile to find solutions to difficult problems and thinks outside of the box to locate the answers. There are times when information delivered may not be what a client wants to hear. If truth is what you seek, I highly recommend Jeff Marlin and guarantee that he is thorough, honest, and will never mislead a client. He delivers information, solutions, and results with integrity and professionalism.
Jessica Blome
Jun 19, 2020
Jeff and his team are excellent at what they do. I've hired Jeff many times, and each time, he does what it takes to get the information I need to make my case. As an environmental attorney, I feel like I can rely on Jeff to help build my case and testify credible when needed. I'd hire him again in a heartbeat!
Shari Bedard
May 22, 2020
M. BROWN LAW OFFICE: Very gifted and professional P.I. Have used the Companies Services many times, very prompt-quick turn-a-round per case results. Jeff, is a very nice person and he attends to the tasks at hand and keeps the lines of good communication open. Mark R. Brown, Atty. At Law
Gregory Usher
May 12, 2020
I am a local attorney who practices a lot in general litigation and landlord-side representation. As part of my business, I sometimes need papers served on short notice. Jeff has done a fantastic job being responsive, professional, and quick to turn things around for me when I send a rush request. I couldn't recommend his services more highly and I know the service part is only one aspect of his business. He is definitely a go-to for me and my firm.
Tim Braatz
Mar 24, 2020
Have worked with Marlin's Special Investigations on several different cases over the past 15 years, Jeff is a true Professional and always does a great job for his Clients. He is a former Board Member of the Iowa Assoc. of Private Investigators and has years of Advanced Training through that Group.
Kenn SubTeach
Mar 13, 2020
Mr. Marlin was great to work with. He gave me a lot of useful information and was always pleasant to deal with. Oh and by the way got great info on my case. Would highly recommend his services.
Nick Mauro
Dec 12, 2019
A colleague recommended Marlin's Special Investigations to help me track down a defendant who was avoiding service. Time was running short on my service deadline. Jeff was able to locate and get defendant served right away. He was easy to work with and most importantly got the job done. I highly recommend Marlin's Special Investigations.