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Best Private Investigators in Milwaukee, WI

Our Recommended Top 6

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Our goal is to connect people with the best local professionals. We scored Milwaukee Private Investigators on more than 25 variables across five categories, and analyzed the results to give you a hand-picked list of the best.



6Top Picks

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featured provider = Featured Provider

Brookfield, WI 53005 Rating

Why choose this provider?

Private Investigation of WI is a private detective agency in Brookfield that has been serving individuals, businesses, and attorneys state-and nationwide since 2004. The agency offers background investigations, driving records, video and photo surveillance, cell phone and license plate number traces, and people location services for many purposes. The business helps investigate identify theft, insurance fraud, embezzlement, child support cases, and issues of concern regarding specific indivuduals. Other services the agency offers include polygraph tests, debugging, fingerprinting, DNA testing, and trauma scene cleanup. Private Investigation of WI also offers arbitration and mediation services for divorce, small and large claims disputes, workplace and business disputes, and more.

Milwaukee, WI 53224 Rating

Review Sources

5.0 (4)

Why choose this provider?

Thomas Fischer Investigations is the business of a retired City of Milwaukee police detective who has more than 30 years of experience in investigating white collar crime, homicide, and armed robbery. Thomas Fischer attended school while working on the police force, and in 2007, received his master’s degree in police union leadership from Harvard Law School. The business’s website offers security tips to protect children and residences and has a page of resources such as access to the Wisconsin Circuit Courts, the Wisconsin Department of Corrections Sex Offender Registry, the FBI, and live radio communications of Milwaukee-area police forces and fire departments.

Milwaukee, WI 53207 Rating

Why choose this provider?

Spindletop Investigations is a full-service Milwaukee private detective agency that specializes in digital forensics and surveillance. The agency serves individuals, businesses, and law professionals in any matter of investigation including finding cheating spouses online, finding out what children are doing on the internet on the computer and via their cellphones, to see if employees have been stealing from a business, FMLA abuse, workmen’s compensation fraud, and insurance fraud. The agency produces court-admissible evidence for family law and other cases using digital forensics. Spindletop Investigations can recover photos, videos, emails, internet histories and browser cookies, IP addresses, usernames and passwords, instant messenger chat logs, and more.

Milwaukee, WI 53207 Rating

Review Sources

4.2 (5)

Why choose this provider?

L. Johns Services of Milwaukee offers process service, private security services for businesses and individuals, loss prevention, and private detective services. The business performs surveillance, license plate checks, and offers courier services. L. Johns Services investigates individuals for purposes including background checks, child endangerment and other family law issues, insurance fraud investigations, identity theft, and more. The company aims to offer services for affordable prices and speaks both Spanish and English to better serve its customers.

Milwaukee, WI 53237

Why choose this provider?

PI Investigations of Milwaukee is a licensed private detective agency that conducts informational searchers to assist the investigations of attorneys, paralegals, corporations, and private citizens. The agency performs thorough background checks and intensive research to help clients find out what they want to to know about a person and his or her current situation or recent activities. PI Investigations also offers process service from Milwaukee to Madison and Fond du Lac to Beloit.

Milwaukee, WI 53224 Rating

Why choose this provider?

DRP Security Services is a business in Milwaukee that offers professional security services, security consulting, and private investigations. Other investigation-related services the company offers include insurance fraud investigations, evidence gathering and video surveillance, gps tracking, missing person location, loss prevention, and computer and cell phone data recovery. DRP Security Services can recover deleted phone call records, deleted pictures, encrypted files, and can discover attempts to conceal, destroy, or fabricate evidence.

Compare our Top Private Investigators

NameExpertise RatingAddressPromotionsLearn more
Private Investigation of WI
Brookfield, WI 53005
Thomas Fischer Investigations
Milwaukee, WI 53224
Spindletop Investigations
Milwaukee, WI 53207
L. Johns Services
Milwaukee, WI 53207
PI Investigations
Milwaukee, WI 53237
DRP Security Services
Milwaukee, WI 53224


  • Introduction

    Some cases grow cold without ever getting solved by the police, and others tend to be too unorthodox for the police since they're mainly limited to criminal cases. This is where private investigators come in.

    Private investigators, also known as PIs, offer a wide range of services, including finding missing persons, tracking marital infidelity, investigating theft, running background checks, verifying insurance claims, and collecting debts on behalf of their clients.

    PIs work on any case requiring extensive research and investigation. Their duties range from gathering vital facts and connecting clues to providing conclusive information regarding the case.
  • What is a private investigator?

    Private investigators are experienced individuals hired to carry out detective work. They are fact-finding experts who dedicate time and effort to gather evidence and reveal information that would be difficult to gain through ordinary means. Private investigators can either operate alone or work for an agency.

  • Are private detectives real?

    Yes, private investigators are real. They provide their expertise to anyone who needs an in-depth investigation for an important matter. Whether tracking a long-lost loved one, running background checks, finding missing persons, or conducting general research, private detectives operate with discretion and rarely make the news.

  • What do private investigators do?

    PI work involves a lot of information gathering and fact analysis. Their field assignments involve carefully following persons of interest, conducting surveillance, interviewing people, and, sometimes, going undercover to get more information. They use GPS tracking devices, video recorders, computers, and other technology to collect information.

  • How do private investigators work?

    Private investigators’ ability to conduct examinations and close cases without their targets knowing their involvement makes them very effective. A PI firm may have different personnel, each specializing in a particular field. From computer experts to web-data analysts and field officers, these agents work together to solve cases or complete an objective.

  • What is a private investigator allowed to do?

    PIs are civilians, so they're required to operate within the confines of the law. Private investigators search multiple online databases, public records, and open source files to collect information. However, they cannot bug phones or hack into online accounts to acquire protected information. They can conduct surveillance on people in public places, but they can't trespass into their homes or property.