Criminal Defense Investigations
From capital cases to high-level felonies — led by a retired Master Peace Officer who knows how the other side builds its case.
Investigate Like Law Enforcement. Work for the Defense.
Understanding how prosecutors and law enforcement build cases is the single greatest advantage a defense investigator can have. Our CEO, Billy Guerrero III, retired as a Master Peace Officer — the highest law enforcement certification in Texas — after a career that included criminal investigations at the highest levels.
That insider knowledge means we know exactly where to look, what to challenge, and how to find the evidence that changes outcomes for your clients.
Billy Guerrero III, Master Peace Officer (Ret.)
CEO & Chief Investigator — the highest law enforcement certification in Texas
Why Defense Attorneys Trust Guerrero Investigations
Retired Master Peace Officer — our CEO knows how law enforcement investigates, documents, and presents cases.
Experienced in capital cases and high-level felonies where the stakes are highest.
In-house Licensed Professional Counselor for cases with mental health or mitigation components.
Courtroom-ready reports and documentation prepared to support your defense strategy.
Our Criminal Defense Services
Capital Case Investigation
High-stakes cases demand the highest level of investigative skill. Our team has experience working capital cases and understands the thoroughness required.
Felony Defense Investigation
From drug offenses to violent crimes, we conduct independent investigations that identify weaknesses in the prosecution's case and uncover evidence in your client's favor.
Witness Location & Interviews
We locate hard-to-find witnesses and conduct professional interviews — using law enforcement-trained techniques to get complete, reliable accounts.
Evidence Review & Analysis
We review existing evidence with a trained eye, identifying inconsistencies, procedural issues, and overlooked details that can make a difference at trial.
Scene Investigation
On-site investigation of crime scenes, accident locations, and relevant locations — documenting conditions, measurements, and details that may have been missed.
Background & Records Research
Thorough background investigations on witnesses, complainants, and other parties — uncovering prior history, credibility issues, and relevant records.
Discuss Your Defense Case
We work with criminal defense attorneys throughout Texas. Contact us for a confidential consultation.