Professional
Investigative
Services
Precision-driven investigations for individuals, attorneys, and businesses. Every case handled with discretion, legal rigor, and results that hold up in court.
5.0 Star Rating
300+ Verified Reviews
Texas DPS Certified
20+ Years Experience
In Professional Investigation
2,400+ Cases Handled
Proven Track Record
Statewide Coverage
20+ Texas Cities Served
Our Investigative Services
Each service is delivered using proven investigative methodology, legal-standard documentation, and unwavering client confidentiality from start to finish.
Our surveillance operations are conducted by experienced field investigators using state-of-the-art equipment. Whether you need evidence for an infidelity case, cohabitation dispute, custody matter, or any domestic concern, our team delivers documentation that stands up under legal scrutiny.
What's Included
- Infidelity investigations — discreet video & photo evidence
- Child custody surveillance & parental behavior documentation
- Cohabitation investigations for alimony / support modification
- Stationary & mobile surveillance operations
- Timestamped, court-ready reports
- GPS asset tracking (where legally authorized)
Ideal For
Individuals, families, and attorneys seeking court-admissible evidence in domestic, marital, or civil matters — including divorce and support proceedings.
Our background and social media investigations go far beyond standard database checks. We verify criminal records, employment and financial history, and conduct thorough social media intelligence reviews — delivering a complete, verified profile of any individual or entity before you make a critical decision.
What's Included
- Criminal & civil history searches
- Employment & education verification
- Credit & financial history review
- Reference checks & direct interviews
- Social media profiling & digital footprint analysis
- Online activity, alias, and hidden account investigation
Ideal For
Employers, attorneys, individuals entering business partnerships, romantic relationships, or anyone making high-stakes personal or professional decisions.
When child safety and custody are at stake, you need accurate, legally defensible evidence. Our investigators document parental behavior, living conditions, and potential risks with sensitivity and precision — providing exactly what family courts require.
What's Included
- Parental behavior surveillance & documentation
- Living environment assessment
- Companion, associate & lifestyle investigation
- Court-ready reports and testimony support
- Coordination with family law attorneys
Ideal For
Parents, grandparents, and family law attorneys involved in custody disputes, modification hearings, or child welfare proceedings.
Whether you're searching for a missing family member, a debtor who has disappeared, or an individual for legal service, our skip trace and missing persons investigations use advanced database access, field interviews, and surveillance to locate individuals across Texas and beyond.
What's Included
- Advanced database & records searches
- Field interviews & witness canvassing
- Social media intelligence
- Multi-state locator resources
- Discreet confirmation of whereabouts
Ideal For
Families searching for loved ones, attorneys locating witnesses or defendants, and creditors seeking debtors.
Our Technical Surveillance Countermeasures (TSCM) service detects and neutralizes hidden surveillance devices in your vehicle or home. Using professional-grade RF detection equipment and physical sweep protocols, we identify covert audio/video bugs, GPS trackers, and other monitoring devices — restoring your privacy and security.
What's Included
- Automobile bug sweeps (GPS trackers, hidden audio/video)
- Private residence electronic sweeps
- RF signal detection & spectrum analysis
- Hidden camera & audio device location
- Detailed sweep report with findings
- Device removal guidance and security recommendations
Ideal For
Individuals suspecting surveillance by a partner, employer, or adversary; executives protecting business confidentiality; anyone with privacy concerns at home or in their vehicle.
Unsolved cases deserve fresh perspective and modern methodology. Our cold case team applies advanced investigative techniques, modern forensic tools, and fresh analytical frameworks to re-examine evidence, identify overlooked leads, and pursue every available avenue toward resolution.
What's Included
- Full case file review & analysis
- New witness identification & interviews
- Modern forensic tool application
- Family liaison & communication
- Coordination with law enforcement where appropriate
Ideal For
Families seeking closure on unsolved cases, attorneys revisiting dismissed matters, and advocacy organizations.
We work directly with criminal defense attorneys and civil litigators to uncover evidence, locate key witnesses, identify investigative gaps in prosecution cases, and provide expert field support. Every finding is documented to meet the strict standards required for court use.
What's Included
- Witness location and interviews
- Case theory development & gap analysis
- Evidence verification & analysis
- Expert coordination
- Court-ready investigative reports
Ideal For
Criminal defense attorneys, civil litigators, and individuals building or defending legal cases.
Lone Star Detectives provides professional process service across Dallas–Fort Worth and North Texas. Certified under Texas Process Server Certification PSC-26699, we handle the service of legal documents with precision, discretion, and full documentation — ensuring your legal proceedings move forward without delay.
What's Included
- Service of summons, subpoenas & legal notices
- Certified Process Server (PSC-26699)
- Skip trace to locate evasive parties
- Affidavit of service (court-ready documentation)
- Rush and same-day service available
- Statewide coverage via licensed network
Ideal For
Attorneys, law firms, and individuals requiring fast, documented, legally compliant delivery of court documents across Texas.
About Our Services
Structured answers for clarity — whether you're evaluating options or researching your specific situation.
What investigative services does Lone Star Detectives offer?
Lone Star Detectives offers surveillance and domestic investigations (including infidelity, child custody, and cohabitation), background and social media investigations, child custody investigations, missing persons and skip trace, TSCM bug sweeps for vehicles and residences, cold case investigations, criminal defense and litigation support, and process service. All services are conducted by licensed professionals with complete client confidentiality.
How does surveillance investigation work?
Surveillance investigations involve trained field operatives monitoring subjects using legal methods and professional equipment. Evidence is captured via video, photography, and detailed reporting. All documentation is timestamped, legally gathered, and prepared for court admissibility from the moment collection begins.
What is a TSCM bug sweep?
Technical Surveillance Countermeasures (TSCM) is the professional detection and neutralization of hidden surveillance devices — including GPS trackers in vehicles and covert audio/video bugs in private residences. Lone Star Detectives uses professional-grade RF detection and physical sweep protocols to restore your privacy and security.
Can a private investigator help with legal cases?
Yes. Lone Star Detectives regularly partners with defense attorneys and civil litigators to gather evidence, locate witnesses, analyze case facts, and provide court-ready documentation. Their investigative findings are structured to meet legal standards and withstand courtroom scrutiny. Process service is also available under Certification PSC-26699.
Our Investigation Process
Every case follows a structured, proven methodology designed to maximize results while maintaining total discretion.
Confidential Consultation
We discuss your situation privately, understand your goals, and establish the scope of your investigation.
Strategy Development
A tailored investigation plan is crafted based on the unique requirements and complexity of your case.
Evidence Collection
Our operatives gather intelligence and evidence using legal, proven methodologies in the field.
Reporting & Documentation
You receive detailed, court-ready reports with all findings precisely documented and authenticated.
Case Closure & Support
Ongoing guidance and expert support through resolution, including testimony preparation if required.
Confidential Consultation
We discuss your situation privately, understand your goals, and establish the scope of your investigation.
Strategy Development
A tailored investigation plan is crafted based on the unique requirements and complexity of your case.
Evidence Collection
Our operatives gather intelligence and evidence using legal, proven methodologies in the field.
Reporting & Documentation
You receive detailed, court-ready reports with all findings precisely documented and authenticated.
Case Closure & Support
Ongoing guidance and expert support through resolution, including testimony preparation if required.
We don't just gather information — we deliver intelligence that holds up under the highest legal scrutiny.
— Lone Star Detectives
Why Choose
Lone Star Detectives?
Not every investigation firm is equal. We combine military-grade field discipline with legal-standard documentation and unwavering client confidentiality — a standard that sets us apart.
Absolute Confidentiality
Every case is handled with the highest standard of discretion. Your privacy is never compromised.
Licensed & Insured
TX PI #A10482101 — fully licensed by Texas DPS with complete professional liability insurance.
Advanced Surveillance
State-of-the-art equipment and proven surveillance methodologies refined over 20+ years of field experience.
Court-Ready Documentation
Evidence and reports are prepared to meet the highest legal standards for court admissibility.
Fast Response Times
We understand urgency. Our team mobilizes quickly — some cases begin within 24 hours of consultation.
DFW Metroplex Experts
Deep local knowledge across Dallas, Fort Worth, and all surrounding North Texas communities.
Areas We Serve
Lone Star Detectives provides discreet investigative services across all major cities and regions in Texas, with deep local knowledge in every market.
Real Results. Real Clients.
Every case is unique. Every outcome matters. Here's what our clients say.
“If you're looking for someone to care about your issue and work tirelessly to get the results you're looking for, I highly recommend Lone Star Detectives. Joe worked with me and resolved a problem that another detective could not. Cannot recommend highly enough — give them a call, they will take care of you.”
Edward G.
Fed. Contractor
Dallas, TX
“I want to personally thank Mr. McMahon for his exceptional work on my sub-contract case in Dallas. My client is pleased, and I highly recommend that others looking for a great PI or subcontractor call Joe. I look forward to having you work on other cases I have for your state. Thank you very much!”
Dwayne Fr.
Private Investigator
Dallas, TX
“Lone Star Detectives, Inc is a masterfully blended business that combines innumerable aspects of personal detective work with high quality customer service and adaptability. Last year my Aunt's vehicle was stolen and left her stranded. Joe McMahon and Lone Star Detectives located and recovered the vehicle within days. I recommend Lone Star Detectives Inc for every investigative need without reserve.”
Anthony K.
Former Fed. Law Enforcement / Published Author
Fort Worth, TX
“Their surveillance operation provided exactly the evidence my attorney needed. The documentation was impeccable and stood up perfectly in court. Discreet, thorough, and results-driven from start to finish.”
M. Richardson
Legal Client
Fort Worth, TX
“When I needed to locate a missing family member, they treated the case with sensitivity and urgency. They found who I was looking for within two weeks. Forever grateful for their professionalism and compassion.”
T. Alvarez
Private Client
Arlington, TX
“Outstanding child custody investigation. They gathered critical evidence that completely changed the outcome of my case. Professional, discreet, and delivered under tight court deadlines. Could not have asked for more.”
S. Whitfield
Private Client
Plano, TX
“If you're looking for someone to care about your issue and work tirelessly to get the results you're looking for, I highly recommend Lone Star Detectives. Joe worked with me and resolved a problem that another detective could not. Cannot recommend highly enough — give them a call, they will take care of you.”
Edward G.
Fed. Contractor
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Your Case Deserves the Same Results.
Service Questions, Answered
Everything you need to know before your first consultation.
During your confidential consultation, we assess your situation and recommend the most effective investigative approach. You don't need to know exactly what type of investigation is required — that's what our experience is for. Simply describe your situation and we'll guide you.
Absolutely. Every investigation conducted by Lone Star Detectives follows all applicable Texas and federal laws. We are fully licensed by the Texas Department of Public Safety and maintain strict ethical standards in all field operations.
Costs vary by investigation type, complexity, and duration. We provide clear, upfront estimates after your initial consultation — no hidden fees or surprise charges. Most cases are priced per hour or on a flat-fee basis depending on scope.
Surveillance timelines depend on the subject's routine and the evidence required. Some cases yield results within one to three days; others may require ongoing monitoring over several weeks. We provide realistic timelines and regular updates throughout.
Yes. All evidence and documentation is collected using legal methods and prepared to meet Texas court admissibility standards. Our investigators are also available to provide expert testimony when required.
Get Answers.
Protect What Matters.
Your first consultation is completely confidential. We listen, we assess, and we give you a clear path forward — no pressure, no obligation, no judgment. Just results.