When you’re involved in a high-stakes legal battle, a complex corporate dispute, or a sensitive personal matter in the Dallas-Fort Worth Metroplex, information is your most valuable currency. But not just any information: it has to be the kind that stands up to the scrutiny of a judge in a Tarrant County courtroom or holds weight during a deposition in downtown Dallas.
At Armstrong Investigations, PLLC, we often see individuals and businesses try to take matters into their own hands, only to realize that "evidence" gathered incorrectly is worse than no evidence at all. It can lead to dismissed cases, legal sanctions, or even criminal charges for the person trying to play detective.
In this guide, we’re breaking down the fundamentals of professional surveillance. Whether you’re a legal professional looking for a reliable partner or a private individual needing answers, understanding how admissible evidence is gathered is the first step toward winning your case.
What Makes Surveillance "Professional"?
Surveillance is more than just sitting in a car with a camera. In the investigative world, professional surveillance is the strategic observation of persons, places, or objects to gather facts. In the DFW area, from the busy streets of Collin County to the quiet suburbs of Johnson County, the goal is always the same: to document the truth in a way that is legally bulletproof.
Professional surveillance involves:
- Licensing: In Texas, performing investigative work without a license is a serious offense.
- Documentation: A professional doesn't just provide a video; they provide a detailed, chronological report that cross-references the footage.
- Discretion: If the subject knows they are being watched, the investigation is compromised. Professional investigators know how to blend into the North Texas landscape.

The Gold Standard: Is Your Evidence Admissible?
The biggest question we get at Armstrong Investigations, PLLC is: "Can I use this in court?" In Texas, the answer depends on how the evidence was obtained. For evidence to be admissible, it generally must meet three criteria: it must be relevant, it must be authenticated, and it must be legally obtained.
1. The Licensing Requirement
Texas law is very strict. The Texas Department of Public Safety (DPS) regulates private investigators. If you hire someone who isn't licensed, or if you try to do it yourself, the court may rule the evidence "worthless." A licensed investigator from Armstrong Investigations, PLLC acts as a third-party witness whose testimony and findings carry professional weight that a biased party’s observations simply don’t.
2. No Reasonable Expectation of Privacy
This is the cornerstone of surveillance law. You can generally record anything that happens in "plain view" in a public place. If someone is walking their dog in a park in Plano or loading a truck at a warehouse in Fort Worth, they do not have a reasonable expectation of privacy. However, if an investigator uses a ladder to peer into a second-story bedroom window or uses specialized technology to listen through walls, they have crossed a legal line. Evidence gathered this way will be thrown out, and it could land the investigator in hot water.
3. The Authentication Process
To use a video in court, you have to prove it is what you say it is. This is known as "authenticating" the evidence. The Texas Supreme Court has established that judges should generally view surveillance video before deciding on its admissibility (a rule often cited from the Diamond Offshore line of cases). This means your footage needs to be clear, unedited, and backed by an investigator who can testify to the date, time, and location of the recording.
Surveillance in Texas Family Law
Family law is one of the most common areas where surveillance is utilized in the DFW Metroplex. Whether it’s a divorce in Dallas County or a custody dispute in Denton County, the stakes are incredibly high.
Understanding Temporary Spousal Support
In Texas, we do not use the term "alimony" in the traditional sense found in other states. Instead, we refer to it as Temporary Spousal Support. It is important to note that this is only available in a select number of cases and is often subject to strict requirements. Surveillance can be a key factor here: for example, if a spouse claiming financial need is actually living a lifestyle that contradicts their filings, professional documentation can be a game-changer.
Same-Sex Relationships and the Law
Since the 2015 Obergefell v. Hodges decision, the legal landscape for same-sex couples in Texas has been clear: same-sex couples are treated exactly the same as opposite-sex couples in all Texas family law issues. Whether we are investigating cohabitation, asset concealment, or child custody matters, the same rules of evidence and professional standards apply across the board.

The Pitfalls of DIY Surveillance
In the age of AirTags and cheap hidden cameras, it’s tempting to try DIY surveillance. However, in Texas, this is a legal minefield.
- GPS Tracking: You cannot legally place a GPS tracker on a vehicle in Texas unless you are the owner of the vehicle or have consent from the driver. Doing so can lead to criminal stalking charges.
- Audio Recording: Texas is a "one-party consent" state for recording conversations, but this usually applies when you are a participant in the conversation. Hiding a "bug" in a room to record two other people is illegal wiretapping.
- Trespassing: Entering someone’s private property in Rockwall or Ellis County to get "the perfect shot" is a crime. Any evidence gathered while trespassing is likely to be inadmissible.
At Armstrong Investigations, PLLC, we know exactly where the line is. We use advanced techniques to get the results you need without putting your legal standing at risk.
Corporate and Business Investigations in DFW
It’s not just individuals who need surveillance. Businesses across the DFW Metroplex: from the tech hubs in Richardson to the industrial centers of Fort Worth: rely on professional surveillance for various reasons:
- Workers' Compensation Fraud: If an employee claims a debilitating injury in Tarrant County but is seen lifting heavy boxes at a local gym, surveillance is the most effective way to prove fraud.
- Asset Protection: Monitoring high-value shipments or investigating internal theft.
- Non-Compete Violations: Ensuring that former employees aren't poaching clients or sharing trade secrets in violation of their contracts.

Why DFW Relies on Armstrong Investigations, PLLC
The Dallas-Fort Worth area is a massive, complex region. Navigating the traffic on I-75 while maintaining a "tail" or knowing the layout of specific neighborhoods in Kaufman or Johnson County requires local expertise.
We pride ourselves on being a premier choice for legal investigative services in North Texas. We understand the local court systems and the expectations of DFW-based attorneys. When we hand over a surveillance report, it isn't just a collection of notes: it’s a professional document designed to be used by legal counsel to build a winning strategy.
Essential Checklist for Hiring a DFW Private Investigator:
- Verify the License: Always check their Texas DPS license number.
- Ask About Experience: Have they handled cases in your specific county?
- Check Their Tech: Do they use high-definition cameras and provide time-stamped footage?
- Review the Contract: Ensure they operate within the bounds of Texas law to protect your admissibility.

Conclusion
Surveillance is a powerful tool, but it is one that must be wielded with precision and legal knowledge. Whether you are dealing with a sensitive family matter, a corporate dispute, or a legal case that requires the highest level of proof, Armstrong Investigations, PLLC is here to help. We serve the entire DFW Metroplex, ensuring that the truth is caught on camera: and that it stays in the courtroom.
If you need professional, discreet, and court-admissible surveillance in Dallas, Fort Worth, or anywhere in North Texas, reach out to us today.
Jasen A. Armstrong, J.D.
Armstrong Investigations, PLLC
P: 214-851-3800 | W: armstronginvestigations.com
Texas DPS Lic. #: 166353101 | Affiliated with TCS Consulting (TX DPS Lic. #: C20493) & Howard Law, PLLC





