How a Private Investigator Supports Criminal Defense Attorneys in Dallas County | Addison 75001
The Case Your Client Needs and the Evidence Only a PI Can ...
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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.
Our criminal defense investigations are commonly requested by:
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:
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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:
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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Our criminal defense insights bring together expert articles, investigative guidance, and real-world perspective from Terrance Private Investigator & Associates.
The Case Your Client Needs and the Evidence Only a PI Can ...
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Licensed private investigators with 17+ years of criminal defense and litigation investigation experience.
Every investigation is handled with professionalism, discretion, and strict confidentiality.
We work under counsel’s direction as part of the defense team, which is how investigative work stays protected.
Most criminal defense investigations can begin within 24 hours, and we prioritize evidence that will not survive a delay.
We report what we find, favorable or not. Counsel cannot use an investigator who only brings back good news.
Criminal defense investigations available nationwide.
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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.
Real cases, real outcomes. A look at the criminal defense investigations we have resolved for clients nationwide.
Case Overview A prominent Houston criminal defense attorney contacted our agency representing ...
Case Overview Marcus was 22 years old and sitting in a Harris ...
Case Overview In early 2025, Sarah (name changed), living more than 1,000 ...
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.
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.