The Litigator's Ultimate Investigative Resource

Attorneys who work with Armstrong Investigations get more than a report. They get an investigative partner who thinks about cases the way they do — because our principal, Jasen A. Armstrong, holds a Juris Doctor (J.D.) degree and brings a law-trained perspective to every engagement. We understand what evidence needs to establish, what it will face when challenged, and how it must be documented to survive.
What We Do

Our Attorney Support Services

Missing persons investigator conducting skip tracing and digital tracking search across North Texas — Armstrong Investigations, PLLC

Witness Locates

Finding a witness who has moved, changed contact information, or is actively avoiding service requires more than a database search. We use professional skip-tracing methodology, multi-source cross-referencing, and field verification to confirm current location and availability — giving your case the witness foundation it needs before trial preparation reaches a critical point.

Difficult & Evasive Service of Process

When standard process service fails — because a subject is evasive, actively avoiding service, or living in circumstances that make location difficult — we get the job done. Our investigators conduct surveillance-informed service operations that identify the right window, the right location, and the right approach to ensure service is completed correctly and documented in a way that closes any procedural gap.

In-Depth Witness Interviews

Early witness interviews, conducted before opposing counsel shapes the narrative, are among the most strategically valuable tools available to a litigator. We conduct structured, thorough interviews that capture testimony in its most current and least influenced form — documenting what witnesses actually know, what they are willing to say, and what the gaps in their knowledge suggest about the broader case picture.

Dallas businesses are making these 7 background check mistakes and paying for it. Armstrong Investigations shows you what to fix before a bad hire becomes a lawsuit.

Evidence Chain of Custody

Evidence that is gathered correctly but documented incorrectly can be excluded just as easily as evidence that was never found. Armstrong Investigations maintains strict chain-of-custody protocols on every piece of material we handle — from initial capture to final delivery. Our files are built to withstand a challenge at the point of admission, not just to be informative.

Background & Impeachment Research

Understanding a witness's history, credibility vulnerabilities, and prior inconsistent statements before they take the stand gives trial counsel a significant advantage. We conduct thorough background research on parties, witnesses, and opposing experts — surfacing prior litigation involvement, public record conflicts, and other material that informs cross-examination strategy.

Professional accident reconstruction investigator at a semi-truck crash scene on a Texas highway with 18-wheeler wreckage in the background Placement: Between the title and the first paragraph

Accident Reconstruction &
Expert Witness Support

Through our exclusive partnership with Michael R. Depew of TCS Consulting, we provide accredited accident reconstruction, EDR black box analysis, vehicle dynamics analysis, and expert witness testimony with 36+ years of deposition and trial experience. When the technical facts of a collision are the case, this is the depth of support that changes outcomes.

WHY ATTORNEYS CHOOSE ARMSTRONG

An Investigator Who Thinks Like a Litigator

The attorneys who return to Armstrong Investigations repeatedly — for family law cases, civil litigation, criminal defense, and insurance defense — share a common observation: working with an investigator who understands the rules of evidence changes what the investigation produces.

Most investigators gather information. Fewer understand how that information needs to be structured, documented, and delivered to be useful in the proceedings it is meant to support. The difference is not subtle — it shows up in whether a motion to suppress succeeds, whether an evidence file is credible under cross-examination, and whether the findings can actually be used when the case reaches its most critical point.

Jasen A. Armstrong’s J.D. background is not a marketing credential. It shapes every case plan, every field operation, and every deliverable that leaves our office.

Jasen A. Armstrong holds a Juris Doctor (J.D.) degree, is not licensed to practice law in Texas, and does not provide legal advice or legal representation. Armstrong Investigations, PLLC provides private investigation services only.
Where We Operate

Attorney Support Coverage Across North Texas

We serve attorneys and law firms throughout the Dallas-Fort Worth Metroplex and North Texas. Our affiliate network allows us to coordinate support for cases that extend beyond Texas when a matter requires it.
Dallas County
Tarrant County
Collin County
Denton County
Rockwall County
Ellis County
Johnson County
Kaufman County
Parker County
Wise County
Hunt County
Navarro County
Henderson County
Hood County
Somervell County
Erath County
Palo Pinto County
National Affiliates
Operations that require coverage beyond North Texas are coordinated through our national affiliate network.
Ready to Work Together?

An Investigative Partner Built for the Work You Do

If you are a litigator who needs an investigator who understands what your case actually requires — not just someone who will take an assignment and deliver a report — we would like to talk. Contact Armstrong Investigations today for a direct, confidential conversation about your case.