What does a private investigator actually do?

Most people’s idea of this job comes from fiction, which sets up two opposite disappointments: expecting an investigator to do things they cannot, and not realising the things they can.

The short answer

A private investigator gathers facts, lawfully, for a client who needs them established — and documents those facts so they can be relied on by somebody else later. That is the whole job. The variety is in what is being established and how.

What the work actually consists of

Observation and documentation

Surveillance is the most recognisable part: observing a person in public places and recording what happens with timestamped photo and video. In practice it is patient and repetitive. The value is not in a dramatic moment, it is in an unbroken, dated record that shows a pattern.

Records research

Far more cases are resolved by research than by fieldwork. Court records, property and address history, business filings, licensing, judgments and liens — a great deal about a person's history is public if you know where to look and how to confirm that a record actually belongs to them. This is unglamorous and frequently the fastest route to an answer.

Locating people

Finding a witness, a relative, or someone who is avoiding service. Records produce leads; the investigator confirms them in the real world before reporting an address as current.

Interviews

Talking to people who have information and have not been asked. Neighbours, former colleagues, witnesses. People are often markedly more forthcoming with a neutral professional than with a party to the dispute.

Reporting

The output. A written report that lays out what was done, what was observed, when, and what it supports — written to be read by an attorney, a mediator or a court, and to survive being challenged.

What a private investigator cannot do

This is where expectations most often break, so it is worth being blunt. In Florida, a licensed investigator is a civilian professional with no law enforcement authority. That means no arrests, no detentions, and no access to law-enforcement-restricted databases.

Beyond that, an investigator cannot lawfully:

• Access someone's phone, email or online accounts without authorisation
• Obtain bank balances, account details or a credit report outside a permissible purpose
• Retrieve sealed or expunged records, or medical records
• Trespass, or record inside a private space where there is a reasonable expectation of privacy
• Place a tracking device on a vehicle in which the client has no legal interest
• Impersonate law enforcement, or compel anyone to answer questions
• Wiretap or intercept private communications

Any investigator who offers to do these things is telling you they are willing to break the law with your money, on your behalf, in a matter where you will be the one exposed. It is the clearest disqualifying signal there is.

Who actually hires investigators

Roughly three groups. Individuals with a personal matter — a relationship they cannot read, a custody concern, someone they need to find, a person they want verified before trusting. Attorneys, who use investigators constantly for witness location, surveillance, background research and service of process. And businesses, for due diligence, workplace matters and suspected fraud.

When it is worth the money — and when it is not

An investigation is worth it when there is a specific, answerable question, the answer would change a decision you have to make, and the facts can plausibly be observed or documented.

It is usually not worth it when you have already decided and want confirmation, when what you need cannot be observed from outside a private space, or when the cost of the work exceeds what the answer is worth to you. A good investigator will tell you which of these you are in during the first conversation. If someone takes a retainer without ever raising the possibility that you do not need them, be careful.

What it costs

Investigative work is usually hourly plus expenses, while defined tasks like background checks and process serving are flat-fee. The driver is time. Nobody can quote you accurately without hearing the situation — and an investigator quoting a firm price before understanding the facts is either guessing or planning to revise it.

How to choose one

Start with the licence, because in Florida it is a legal requirement and it is public record. Ask for the number and check it. Then ask three questions: who will actually do the work, what will I receive at the end, and what would make you tell me not to hire you? The last one is the most revealing question you can ask anybody in this business.

There is a fuller walkthrough in hiring a private investigator in Florida.