Find a Licensed Private Investigator in Missouri

01Why Missourians hire investigators

When a Missouri matter needs a licensed investigator

Investigation requests tend to begin with a nagging doubt. A mother in St. Charles County believes her ex is drinking before driving the children home. A Springfield distributor notices inventory walking out the back door on certain shifts. A Kansas City family needs to find a sibling before a parent's estate can be settled. An adjuster in Columbia questions a workers' compensation claimant who reports he cannot stand for long but is said to be framing houses for cash. Each needs facts gathered lawfully and written up for an attorney, judge or claims file.

Missouri defines that work broadly. Under RSMo Section 324.1100, the private investigator business means furnishing, making or agreeing to make an investigation to obtain information about crimes or wrongs, a person's identity, habits, conduct or whereabouts, lost or stolen property, the cause of fires, losses or injuries, or evidence for court and other proceedings. Doing it for pay without a state license is unlawful. Before hiring, confirm the person holds a current Missouri license and has handled your kind of matter in the county or city where it is happening.

• Family law: dissolution of marriage, custody and visitation
• Civil litigation: witness locates, statements and asset research
• Insurance and workers' compensation claim reviews
• Business concerns: theft, fraud and partner due diligence
• Personal safety: documenting stalking or harassment for counsel or police

02Licensing

How licensing works for a private investigator in Missouri

Missouri has licensed private investigators statewide since 2007 under RSMo Sections 324.1100 through 324.1148. The board sits within the Division of Professional Registration. Under Senate Bill 1421, effective August 28, 2026, Section 324.1102 now names it the Board of Private Investigators, Private Fire Investigators, and Professional Surety Bail Bond Agents; it was long known as the Board of Private Investigator and Private Fire Investigator Examiners, and some state pages may still use that name. The board licenses individual investigators and the agencies that employ them, as well as private fire investigators.

Section 324.1104 sets the core rule. It is unlawful for any person to engage in the private investigator business in Missouri without a license, and unlawful to do business as a private investigator agency without an agency license. The statute defines a private investigator as anyone who receives consideration, directly or indirectly, for engaging in that business, and an agency as a person who regularly employs others to do it. Applicants must meet qualifications, pass an examination and carry required insurance, and licensees complete continuing education to renew.

For clients, the dual structure means there may be two licenses to check: the investigator's own and, if they work for a firm, the agency's. The board can discipline licensees, and unlicensed activity can be prosecuted. The Division of Professional Registration's online licensee search reports license status and serves as primary source verification. Run the search before you sign, compare the names with the contract and keep a copy with your records. If anything looks off, contact the board in Jefferson City.

03Legal limits

What licensed Missouri investigators can and cannot do

A Missouri license is permission to do investigative work for pay, not police authority. A licensed investigator cannot arrest, search a home, force anyone to answer questions or cross posted land without permission. Investigators generally work from public places, circuit court and recorder of deeds records, lawful databases and voluntary interviews. Recording is governed by RSMo Section 542.402. Subsection 2(3) says it is not unlawful for a person to intercept a communication when they are a party or one party has given prior consent, unless the purpose is a criminal or tortious act. Missouri is generally a one-party consent state.

Violating the interception statute is a class E felony, so recording a conversation you are not part of carries real risk. Missouri's stalking statutes, Sections 565.225 and 565.227, cover purposely following or harassing someone in a way that causes fear or alarm, which is why professional surveillance is planned around a lawful purpose, kept limited and logged carefully. Missouri has not had a long-standing statute aimed only at private GPS trackers, and lawmakers have proposed one in recent sessions, so anyone considering a device should get current advice from an attorney.

Federal law sets further limits. Pretexting to obtain bank or telephone records is prohibited, driver records can be released only for permitted purposes and consumer reports used for hiring or renting fall under the Fair Credit Reporting Act. A licensed investigator should be able to explain how these rules shape the plan for your case and what evidence is realistic. Your attorney can confirm how they apply to your facts and whether the evidence will be usable in court.

• Generally lawful: observing and photographing from public streets and places
• Generally lawful: recording a conversation the investigator is part of
• Risky: placing a tracker on a vehicle you do not own; get legal advice first
• Not allowed: posing as police or pretexting for bank or phone records

04Regions

Why local knowledge matters across Missouri

Missouri's two big metros sit on opposite edges of the state, about 250 miles apart on I-70, and both spill across state lines. Kansas City spreads over Jackson, Clay, Platte and Cass counties and faces Kansas City, Kansas, across State Line Road, so an address a few blocks west can put a matter under another state's courts. The St. Louis region crosses the Mississippi into Illinois. Jackson County runs courthouses in both Kansas City and Independence, which affects where a case is filed and heard.

St. Louis has a structure found almost nowhere else. The City of St. Louis separated from St. Louis County in 1876 and is an independent city with its own circuit court, the 22nd Judicial Circuit, while St. Louis County's courts sit in Clayton as the 21st Circuit. St. Louis County is divided among dozens of municipalities, each with its own police department or contract. Investigators who work there know which agency covers which street and where municipal records are kept.

Beyond the metros, the work shifts. Springfield and Branson anchor the Ozarks, where tourism and lake communities create seasonal patterns. Columbia and Jefferson City combine the university and state government. Joplin sits near the Kansas and Oklahoma lines, St. Joseph faces Kansas across the Missouri River and the Bootheel is flat Delta farm country bordering Arkansas and Tennessee. Rural northern counties are spread out. Delator Group matches Missouri requests by county, and cases that cross into Kansas or Illinois need separate referrals.

05Pricing

How Missouri investigators usually price their work

Each investigator sets and quotes their own fees, and the structure depends on the assignment. Surveillance and field work are usually billed by the hour, often with a daily minimum so a short shift still covers the investigator's time. Mileage or travel time is common outside the investigator's home area, which adds up when a case runs from the Kansas City suburbs to a small county seat in the Ozarks. Database charges, certified copies from circuit clerks and recorders of deeds and similar costs are typically billed as expenses.

Most investigators ask for a retainer before work begins and bill against it, returning or invoicing the balance at the end. Some quote a set price for narrow tasks, such as a single records pull or a defined background summary. Ask what the estimate covers, how often you will receive updates, whether report writing and video editing are billed separately and what happens if the subject does not leave home on the planned day. A clear written agreement protects both of you.

06Before the first call

How to prepare for your first conversation with an investigator

Good first calls are short and specific. Write down what you need to learn, why it matters and what you will do with the answer. If a case is already open, have the case number, the circuit and county, your attorney's name and any hearing dates. For a person, gather the full name, date of birth if known, past addresses, vehicles, employer, a recent photo and a usual weekly routine. For a business concern, collect the records or messages that raised the question in the first place.

Expect questions in return. A licensed investigator will want to confirm the goal is lawful and will decline work that looks like an attempt to find or harass someone who has good reason to stay out of sight. In custody and protection order matters, they may ask to see the court paperwork. Mention weapons, past violence or existing orders that could affect safety. Clear facts lead to an accurate quote. When you are ready, send a brief request with the county or city and the goal.

• Your goal in one or two sentences
• County, or St. Louis city, and the city where the activity happens
• Names, birth dates, addresses and vehicles you already know
• Case number, court and attorney contact, if any
• Budget range and any firm deadline

Cities

Top 20 cities in Missouri for private investigator requests

These are Missouri's 20 largest cities by the Census Bureau's July 2025 population estimates, with the county that holds most of each one. St. Louis is an independent city outside any county. Kansas City and several suburbs cross county lines, which can change the courthouse and police agency involved, so include a street address or ZIP code with your request.

Counties

Top 20 Missouri counties for investigator requests

Missouri has 114 counties plus the independent City of St. Louis, which functions as a county for courts and records. Each has a circuit clerk and a recorder of deeds. The 20 below are the most populous by July 2025 Census Bureau estimates, with St. Louis city included in its population rank.

Investigation types

Investigations licensed Missouri investigators handle

These are the request types Delator Group most often refers to licensed Missouri investigators. Each investigator decides which work to accept and how to carry it out. The short descriptions explain what the work generally involves under Missouri law, so you can describe your situation clearly when the investigator gets in touch.

• SurveillanceA licensed investigator observes and records activity from public vantage points, keeps a time-stamped log and writes a report, planning the work to stay clear of Missouri's stalking and trespass laws.Learn more
• Child custody investigationsInvestigators document a parent's conduct, who is present in the home and conditions during parenting time, producing evidence a family lawyer can use in a Missouri circuit court custody case.Learn more
• Infidelity investigationsMissouri divorces turn on whether the marriage is irretrievably broken, but marital misconduct can affect property division and maintenance. An investigator gathers lawful observations an attorney can weigh.Learn more
• Locating peopleInvestigators locate witnesses, debtors, heirs and lost relatives through public records, licensed data sources and field checks, staying within federal limits on phone and financial records.Learn more
• Background researchInvestigators review court, property and business records. Reports used for employment, tenant or credit decisions fall under the federal Fair Credit Reporting Act and require a consumer reporting agency.Learn more
• Asset searchesInvestigators trace real estate, business interests, vehicles and liens through county recorders of deeds and state filings to support divorce property division, collections or judgment enforcement.Learn more
• Insurance and workers' comp claimsFor insurers, self-insured employers and defense counsel, investigators compare claimed limitations with observed activity, canvass for witnesses and verify employment, all from lawful public locations.Learn more
• Criminal defense investigationWorking through defense counsel, investigators interview witnesses, revisit scenes, collect video and review discovery for felony and misdemeanor cases in Missouri circuit courts and their associate divisions.Learn more

How matching works

How investigator matching works in Missouri

1. 01

   Send your request

   Use the contact form or call. Describe what you need, the county or city, any deadline and the best way to reach you. Keep sensitive details brief until you speak with the investigator.

2. 02

   Request review

   Delator Group reviews the request for completeness and lawful purpose and may ask a quick follow-up about location, timing or court involvement before it is referred.

3. 03

   Referral to a Missouri investigator

   The request is referred to an independent investigator who holds a Missouri license and works in or near the county involved, so local courts and roads are familiar.

4. 04

   The investigator contacts you

   The investigator calls or emails, discusses scope and method, quotes their own fee and, if you decide to go ahead, signs a written agreement with you directly.

5. 05

   You verify and decide

   Before you sign, look up the investigator and any agency in the Division of Professional Registration's online licensee search. There is no obligation to hire.

Licensing

How Missouri licenses private investigators

Missouri licenses private investigators and private investigator agencies statewide through a board in the Division of Professional Registration. An individual who engages in the private investigator business for pay needs a license, and anyone who regularly employs others to do that work needs an agency license. Applicants must qualify, pass an examination and carry insurance, and licensees complete continuing education. The Division's online licensee search makes checking a license quick, and it is the simplest protection a client has.

Before you hire

What to check before you hire an investigator in Missouri

FAQ

Frequently asked questions

Nationwide

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