How Do Private Investigators Conduct Surveillance?

Surveillance may be considered in matters involving:

• Suspected infidelity or relationship concerns.

• Child custody and family-related disputes.

• Certain insurance or civil claims.

• Employee misconduct or suspected workplace theft.

• Litigation support.

• Other legitimate investigative matters requiring factual observation.

The methods used should be selected according to the question the investigation is intended to answer.

Professional surveillance is about documenting relevant facts, not monitoring someone without a defined purpose.

2. How Does a Private Investigator Prepare for Surveillance?

Effective surveillance begins with an assessment of the client's information and objectives.

An investigator may review known details about the subject, relevant locations, and the specific circumstances requiring observation.

Establishing the Investigative Objective

The investigator should identify the central question.

For example, a client may want to determine whether an individual visits a particular location during a recurring absence.

That is a more focused objective than asking an investigator to observe everything the individual does indefinitely.

Reviewing Available Information

Depending on the assignment, useful information may include:

• Accurate identifying details.

• Known vehicle descriptions.

• Relevant schedules.

• Locations associated with the concern.

• Dates or times of reported activity.

• Information about previous observations.

• Relevant documents lawfully possessed by the client.

The investigator should evaluate the accuracy of the information rather than assume every detail is correct.

Assessing Legal and Practical Limitations

Before surveillance begins, the investigator should consider whether the proposed activities can be performed lawfully and safely.

Private investigators do not receive special authority to trespass, enter private residences, or disregard privacy laws.

3. What Types of Surveillance Do Private Investigators Use?

Surveillance methods vary depending on the circumstances and applicable legal restrictions.

Stationary Surveillance

Stationary surveillance involves observing relevant activity from an appropriate fixed location.

For example, an investigator may document arrivals or departures at a location where observation is lawful.

The investigator must consider visibility, safety, privacy, and the limitations of the observation point.

Mobile Surveillance

Mobile surveillance involves observing relevant movements between locations when doing so is lawful and safe.

Traffic, road conditions, visibility, and changes in the subject's activities can affect the continuity of observation.

Investigators should not endanger the public or violate traffic laws to maintain surveillance.

Photographic and Video Documentation

Photographs and video may help preserve observable activities.

However, the legality of recording depends on the circumstances, including location, privacy expectations, and applicable law.

Records Research Supporting Surveillance

In some assignments, lawful records research may help clarify identifying details or relevant locations before fieldwork.

Research findings must be verified and should not be treated as conclusive merely because they appear in a database.

4. How Do Private Investigators Follow Someone Legally?

Following someone does not mean an investigator has unlimited authority to monitor that individual.

Private investigators must operate within the law and avoid conduct that constitutes harassment, stalking, trespassing, or other prohibited activity.

Observation in Publicly Accessible Areas

Certain activities observable from places where an investigator is lawfully present may be documented.

However, being in a public place does not automatically make every form of surveillance lawful.

The method, duration, purpose, and applicable privacy or anti-stalking laws can affect the legal analysis.

Respecting Private Property

Investigators cannot enter restricted property without lawful authority.

They also cannot enter private residences or other protected spaces merely because the client requests information about activities occurring inside.

Safety Takes Priority

Surveillance should never involve reckless driving, dangerous maneuvers, or confrontations intended to provoke a reaction.

Losing visual contact with a subject may be preferable to creating a safety risk.

What we recommend: Choose an investigator who can explain surveillance limitations and who does not promise to maintain uninterrupted observation under every circumstance.

5. What Equipment Do Private Investigators Use for Surveillance?

Professional surveillance may involve ordinary photographic, video, and documentation equipment.

The equipment selected depends on the assignment and the legal conditions under which it will be used.

Cameras and Video Equipment

Cameras may document observable activities when recording is lawful.

The usefulness of the resulting material depends on image clarity, context, accurate identification, and preservation.

Time and Activity Logs

Written or electronic logs may record observations, relevant times, locations, and changes in activity.

These records help establish a chronological account of what occurred.

Communication Equipment

Where multiple authorized investigators are involved, communication equipment may support coordination.

The use of any device must comply with applicable law.

GPS and Electronic Tracking

GPS tracking is frequently misunderstood.

A private investigator's license does not automatically authorize placing a tracking device on someone's vehicle or monitoring their location electronically.

Tracking may implicate Texas Penal Code Section 16.06, federal law, privacy rights, consent, and other legal considerations.

Investigators should not use tracking devices without an appropriate legal basis.

6. What Can Surveillance Evidence Actually Prove?

Surveillance can establish certain observable facts.

For example, photographs or video may document that an individual arrived at a location, met another person, or engaged in a particular visible activity.

However, surveillance cannot necessarily establish why an activity occurred or what happened outside the investigator's view.

Observable Facts Versus Assumptions

Consider an investigator who documents two people meeting at a restaurant.

The observation may establish that the individuals were together at a particular place and time.

It does not automatically establish an intimate relationship, financial arrangement, or improper conduct.

The Importance of Context

A brief recording may omit events that occurred before or after the documented activity.

Professional reporting should explain significant limitations rather than present isolated footage as a complete account.

Corroboration

When appropriate, additional lawful information may help verify an observation.

The purpose is to improve reliability, not to force evidence into a predetermined interpretation.

The strongest investigative findings are those that can be accurately explained and supported.

7. How Is Surveillance Used in Infidelity Investigations?

Infidelity surveillance may be requested when a client has specific concerns about a spouse's or partner's activities.

An investigator may document relevant observable movements, meetings, or activities during an authorized observation period.

What Clients Should Understand

Surveillance may reveal information that supports a concern, contradicts an assumption, or leaves the question unresolved.

The investigator cannot guarantee that suspected conduct will occur during the assignment.

Why Scheduling Matters

A defined observation period based on reliable information may provide a more focused investigative objective.

However, a predictable schedule does not guarantee meaningful findings.

Reporting Infidelity-Related Observations

Investigators should document what occurred without exaggerating the meaning of interactions.

A meeting between two people is not necessarily proof of infidelity.

8. How Is Surveillance Used in Child Custody Investigations?

Certain child custody matters may involve concerns about supervision, safety, or compliance with court-ordered arrangements.

Lawful surveillance may help document observable activities relevant to specific questions.

However, these assignments require particular sensitivity because children may be involved.

Protecting Children's Privacy

Investigative methods should avoid unnecessary intrusion into children's lives.

The presence of a child does not eliminate applicable privacy protections.

Working With Family-Law Attorneys

When surveillance is intended for litigation, legal counsel can help identify the factual issues that may be relevant.

An investigator cannot determine whether a parent is legally fit or guarantee a custody outcome.

Safety Concerns

If a child may be in immediate danger, emergency services should be contacted.

Suspected abuse or neglect should be reported as required by applicable law. Surveillance should not delay protective action.

9. How Is Surveillance Used in Workplace and Corporate Investigations?

Businesses may consider surveillance when specific concerns arise about misconduct, unauthorized activity, or possible misuse of company property.

However, employer authority has limits.

Workplace Privacy

Surveillance involving employees may implicate privacy, labor, employment, and recording laws.

An employer's ownership of a workplace does not automatically authorize every form of monitoring.

Investigating Specific Allegations

A clearly defined allegation helps establish whether surveillance is appropriate.

For example, an inventory discrepancy may warrant initial records review before field surveillance is considered.

Evaluating the Evidence

An investigator should not assume that an employee's unusual activity establishes wrongdoing.

Observations must be interpreted in the context of job responsibilities, company policies, and other relevant facts.

10. Is Private Investigator Surveillance Legal in Texas?

Private investigative services in Texas are regulated under Texas Occupations Code Chapter 1702 and related requirements administered by the Texas Department of Public Safety.

However, compliance with licensing requirements is only one part of conducting lawful surveillance.

Investigators must also comply with applicable privacy, trespassing, harassment, recording, and other laws.

Recording Conversations

Texas generally follows a one-party-consent framework for certain recordings, but that does not authorize an investigator to intercept conversations to which no consenting party is involved.

Federal law and the laws of other jurisdictions may also apply.

Trespassing and Private Spaces

An investigator cannot enter private property or protected spaces without lawful authority.

Stalking and Harassment

Conduct that constitutes stalking or harassment is not excused by holding an investigative license.

Restricted Electronic Access

Private investigators cannot hack accounts, intercept protected communications, or access confidential information without appropriate authorization.

What we recommend: Verify licensing and ask prospective investigators how they evaluate legal limitations before conducting surveillance.

11. How Long Does Private Investigator Surveillance Take?

Surveillance assignments vary in duration.

Some involve a defined observation period lasting several hours.

Others require multiple periods of observation because the relevant activity is unpredictable or the investigative objective is more complex.

The timeline may be affected by:

• The subject's schedule.

• The location and geographic area.

• The type of activity being investigated.

• The information available before surveillance.

• Legal and practical restrictions.

• The need for additional documentation.

An investigator should explain the proposed scope and reassess whether further surveillance is justified as information develops.

12. How Much Does Private Investigator Surveillance Cost?

Surveillance costs depend on the number of investigators, authorized hours, travel requirements, geographic scope, and reporting arrangements.

Agencies may charge hourly rates, require retainers, or use other agreed fee structures.

Clients should ask whether expenses such as mileage, travel time, or reporting are included.

Why Planning Matters to Cost

A focused investigative objective can help avoid unnecessary hours.

However, surveillance remains unpredictable.

The investigator cannot control the subject's activities or guarantee a particular result.

What to Ask Before Hiring

Clients should clarify the billing structure, proposed observation periods, deliverables, and process for approving additional work.

Professional transparency is more valuable than a promise of guaranteed results.

From Our Investigative Perspective: Surveillance Is More Than Following Someone

Consider a hypothetical situation involving a client who believes an individual is regularly visiting a particular location during an unexplained absence.

The client asks an investigator to document the person's activities.

A poorly defined assignment might involve observation without a clear question or a realistic plan.

A more disciplined approach would begin by evaluating the client's information, identifying the relevant period, and determining whether lawful surveillance could establish useful facts.

During the assignment, the subject might visit the suspected location—or follow an entirely ordinary routine.

Either result must be documented accurately.

If the investigator observes a meeting, the report should describe the interaction without automatically assigning a motive.

If no relevant activity occurs, the report should explain the observations and limitations.

Professional surveillance is not measured by how dramatic the findings appear. It is measured by the reliability of the information obtained and the accuracy of its documentation.

At TJS Private Investigations, we believe this distinction should guide client expectations.

Our Perspective: Effective Surveillance Requires Planning, Patience, and Professional Judgment

At TJS Private Investigations, we recognize that clients often consider surveillance because they need answers to questions that ordinary research or personal observation has not resolved.

Those questions may involve personal relationships, family concerns, legal matters, or business operations.

We believe professional surveillance should begin with a legitimate objective and a realistic assessment of what observation may accomplish.

The investigator's responsibility is not to confirm the client's suspicions.

It is to document relevant activities lawfully and report what the evidence actually establishes.

Surveillance may produce photographs, video, activity logs, or other useful observations.

It may also produce limited or inconclusive results.

Both possibilities should be discussed before work begins.

What we recommend is to prioritize clear investigative objectives, lawful methods, careful documentation, realistic budgets, and objective interpretation of findings.

Professional surveillance should help clients make informed decisions based on facts rather than assumptions.