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About Us

Martin Altstadt founded Altstadt & Associates LLC in 2009, bringing 23 years’ experience as a police detective. He was involved in crimes against person and property, investigating from crime scene to court testimony to conviction.

 

Although most civil cases are resolved without formal court/trial appearances, your decision to hire a private detective needs to include the investigators ability/experience to testify in the event all other avenues fail. Martin has that experience!

 

He has also advised, counseled and assisted people struggling with the most challenging problems/crisis in their lives. He has the desire and ability to help you and will be the person handling your initial consultation as well as being directly involved in your case.

We Provide Quality Service & Results

At Altstadt & Associates we understand how difficult hiring a private investigator can be. We are here to take the pressure off of you, delivering accurate, detailed information that provides our clients with power.

We are fully licensed, insured, and our staff is trained to the highest level and has vast experience in a wide range of investigations.

 

From the moment you call us we are here to listen, consult, and deliver objective non-biased strategy. We stay in touch with you throughout the investigation; and as always, our investigations are handled professionally, discreetly and confidentially.

 

Altstadt & Associates understands getting accurate results for our client is the top priority.  Based in southern Wisconsin, we are a full-service agency, conducting hundreds of investigations for insurance companies, attorneys, businesses and individuals throughout Wisconsin.

 

We use the latest technology and equipment, including HD cameras, as well as the most advanced computer databases to provide top-quality and solid evidence. All of our findings will be presented to you in a report format with video and digital photos; suitable for court.

 

We can solve many complex situations in the most efficient way possible. Many of our clients share their stories of satisfaction with us expressing how we've succeeded in obtaining the facts where other investigators have failed.

 

Meeting your needs is our top priority.​ Let us help you!

CONTACT
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CONTACT US

Altstadt & Associates LLC is based in Janesville, Wisconsin and serves clients throughout the state.

We offer a free consultation to all new clients. Fill out the form below to get started, or call us at 608-751-4994.

© 2025 Altstadt & Associates LLC

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