Criminal Defense Investigations

Protect Your Rights. Uncover the Facts.

Years of Experience
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Closed Cases
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Criminal Defense Investigations

Overview

The prosecution has had investigators on the case since the day it opened. The defense usually starts with a police report and whatever the client can remember.

That imbalance is the reason criminal defense investigations exist. The first version of events written down is rarely the complete one, not because anyone set out to distort it, but because an investigation that stops when it finds an answer never looks for the rest. The National Registry of Exonerations tracks what goes wrong, and the same factors appear year after year: mistaken witness identification, perjury or false accusation, and official misconduct. Every one of those is something an independent investigator can test while a case is still pending.

Over 17+ years and more than 800 closed cases, our work has been to find the parts of the record nobody went back for. At Terrance Private Investigator & Associates, our licensed private investigators locate and interview witnesses, verify alibis, canvass for video before it is overwritten, reconstruct timelines, and document what the original investigation left alone.

Important, if you are the person charged or their family: have your attorney retain us. When defense counsel engages the investigator, the work sits inside the defense team. When a defendant or a relative hires an investigator directly, that protection is much weaker and the investigator can become a witness the other side is entitled to call. If you do not have a lawyer yet, that is the first call, not this one. We will still be here.

Who We Help

Our criminal defense investigations are commonly requested by:

  • Criminal Defense Attorneys
  • Defendants
  • Family Members
  • Law Firms
  • Public Defenders
  • Appeals Attorneys
  • Private Attorneys
  • Businesses
  • Expert Witnesses
  • Court-Appointed Counsel
  • Investigators Working with Defense Teams
  • Wrongfully Accused Individuals
  • Juvenile Defense Attorneys
  • Private Individuals

How We Help

Every case turns on a different gap, so a criminal defense investigation is built around what the defense actually needs established. Our services may include:

  • Witness Interviews
  • Witness Location Services
  • Surveillance Investigations
  • Alibi Verification
  • Evidence Review & Documentation
  • Crime Scene Documentation
  • Timeline Reconstruction
  • Video & Photo Canvassing
  • Social Media Investigations
  • Public Records Research
  • Background Investigations
  • Digital Evidence Review
  • Defendant Background Research
  • Neighborhood Canvassing
  • Statement Verification
  • Mitigation Research
  • Attorney Litigation Support
  • Nationwide Criminal Defense Investigations
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Reasons Clients Request Criminal Defense Investigations

Cases move faster than people expect. Surveillance video gets overwritten on a thirty-day loop. Witnesses relocate, and memories firm up around whatever they were asked first. In our experience the single most common thing a defense investigation turns up is not a hidden bombshell, it is a witness nobody ever went back to, saying something slightly different from what the report says they said.

Our criminal defense investigations are conducted by licensed investigators experienced in witness location, field interviews, canvassing, and records research. We document what we find and we report it accurately, including when what we find does not help. An investigator who only returns favorable findings is useless to a defense attorney, because the one thing counsel cannot afford is a surprise at trial.

Clients commonly contact us for:

  • Witness Interviews
  • Missing Witness Location
  • Alibi Investigations
  • Video Canvassing Before Footage Is Lost
  • Surveillance Evidence
  • Timeline Verification
  • Evidence Review
  • Crime Scene Documentation
  • Digital Evidence Review
  • Social Media Investigations
  • Background Investigations
  • Statement Verification
  • Appeals Investigations
  • Post-Conviction Investigations
  • Mitigation Investigations
  • Defense Trial Preparation
  • Independent Fact Verification
  • Nationwide Criminal Defense Investigations

Common Situations We Investigate

  • A witness in the report was never actually interviewed.
  • Security or doorbell video may exist and is about to be overwritten.
  • An alibi needs to be verified before it is offered.
  • Witness statements do not match the physical evidence or the timeline.
  • A witness has moved and nobody can locate them.
  • New witnesses have come forward since the arrest.
  • Counsel needs an independent look at the state’s investigation.
  • Your attorney needs mitigation background before sentencing.
  • A conviction is on appeal and new evidence may exist.
  • The defense needs every available fact documented before trial.

If any of these sound familiar, timing matters more than almost anything else. Video gets overwritten, witnesses scatter, and scenes change. We will tell you in the first conversation what is realistically still recoverable and what has probably already gone, because truth over speculation applies to what we tell you we can do.

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Insights & Resources

Our criminal defense insights bring together expert articles, investigative guidance, and real-world perspective from Terrance Private Investigator & Associates.

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How It Works

  • 1

    Initial Consultation

    Initial Consultation We listen to the situation and identify what the defense needs established. If you are a defendant or a family member without counsel, we will tell you to get a lawyer first and to have that lawyer retain us, because it protects you.
  • 2

    Investigation Planning

    We build the plan with counsel: which witnesses to reach, which records to pull, what video may still exist, and in what order. Sequence matters here, because the perishable items have to be chased first.
  • 3

    We Investigate

    Our investigators locate and interview witnesses, canvass neighborhoods and businesses for video, document scenes, research records, and conduct surveillance where appropriate. We identify ourselves as investigators and we do not attempt to influence what anyone says.
  • 4

    We Verify

    Findings are reviewed, verified, and organized so counsel can see the source behind every statement. Anything we could not verify is labeled as unverified rather than presented as established.
  • 5

    We Deliver

    Counsel receives a professional investigative report with findings, timelines, and supporting documentation, prepared to withstand cross-examination of the investigator who produced it.

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Why Choose Us

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Next Steps

When someone is facing criminal charges, waiting costs evidence. Video is overwritten, witnesses move, and recollections harden. Our licensed private investigators can find the facts the original investigation did not go back for, and we will tell you honestly what is still recoverable. If you do not have an attorney yet, start there and have them call us. Schedule a confidential consultation.

Case Studies

Real cases, real outcomes. A look at the criminal defense investigations we have resolved for clients nationwide.

Criminal Defense Investigations
Crimial Defense Cases

Criminal Defense Investigation: Explosive Evidence Discovery Exposes Devastating Truth

Case Overview A prominent Houston criminal defense attorney contacted our agency representing ...

Read More
Saving Marcus
Crimial Defense Cases

How We Proved a 22-Year-Old Didn’t Throw the Punch That Could’ve Cost Him 5 Years

Case Overview Marcus was 22 years old and sitting in a Harris ...

Read More
Missing Elderly Mother
Crimial Defense Cases

Missing Elderly Mother: 90 Minutes That Delivered Critical Relief

Case Overview In early 2025, Sarah (name changed), living more than 1,000 ...

Read More

Frequently Asked Questions

Facing charges, or helping someone who is, raises a lot of questions fast. Here are the ones we hear most about criminal defense investigations.

Yes, and in most cases the defense is the only side without investigators until one is hired. We locate and interview witnesses, verify alibis, canvass for video, document scenes, reconstruct timelines, and independently test what the state's file asserts.

 

Absolutely. Many of our criminal defense investigations are conducted on behalf of defense attorneys and law firms.

 

Yes. Witness location is among the most common things we are asked to do, and it is often the most valuable. When we interview, we identify ourselves as investigators working for the defense, we document the statement accurately, and we never suggest what someone should say. An interview conducted improperly damages the case it was meant to help.

Our reports are professionally prepared and may assist attorneys in criminal proceedings, subject to applicable court rules and evidentiary requirements.

Immediately, if video may exist. Many commercial and residential systems overwrite on a loop measured in days or weeks, and once that footage is gone it is gone. Witness memory degrades on a similar curve. Of everything on this page, this is the point we would most want a family to take seriously.

Yes. Every investigation is handled with professionalism, discretion, and strict confidentiality.

Your attorney, and this matters more than most people realize. When defense counsel retains the investigator, the work sits inside the defense team and is protected accordingly. When a defendant or a family member hires an investigator directly, that protection is much weaker, and the investigator can end up as a witness the prosecution is entitled to call. If you do not have counsel yet, get counsel first. We will walk you through how the engagement should be structured, and it costs you nothing to do it the right way.

 

Yes. Post-conviction investigations are a different kind of work, usually focused on witnesses who were never interviewed, evidence never tested, or accounts that have changed since trial. The National Registry of Exonerations documents how often those threads turn out to matter.

 

Contact Us

If you or someone you care about is facing criminal charges, you do not have to sort this out alone. Contact Terrance Private Investigator & Associates to speak with a licensed private investigator. We will explain how a criminal defense investigation works, what is realistically still recoverable given how much time has passed, and how the engagement should be structured with your attorney.