Our Services

DUI/DWI Sample Retesting

For Criminal Defense Attorneys

Independent DUI/DWI blood and urine sample retesting that stands up in court.

DUI/DWI retesting for defense attorneys starts with independent verification. When a case turns on chemical evidence, ReliaLab Test provides split sample retesting exclusively for defense counsel, with nationwide service and sample pickup in the Nashville area.

Nationwide testing 16+ years forensic experience Independent of law enforcement Nashville-area pickup

Independent Verification

DUI/DWI Retesting for Defense Attorneys: Challenge the Evidence with Confidence

State-run and law enforcement laboratories are not immune to mistakes. Faulty calibration, preservative failure, improper storage, chain-of-custody issues, and analytical uncertainty can all compromise DUI blood and urine results. ReliaLab Test conducts independent forensic toxicology testing to verify accuracy and expose weaknesses in the prosecution’s evidence.

  • DUI blood sample retesting
  • Split blood sample testing
  • Urine sample reanalysis for DUI/DWI
  • Blood alcohol content (BAC) retesting
  • DUI drug and controlled substance testing
  • THC and prescription drug blood testing
  • Independent verification of DUI blood evidence

Litigation Support

Built for Criminal Defense Strategy

ReliaLab Test is an independent forensic toxicology lab focused on DUI defense support. We work directly with attorneys to ensure testing meets evidentiary standards, withstands cross-examination, and supports motions to suppress or impeach chemical test results.

  • Independent DUI blood and urine testing
  • Defense-focused toxicology analysis
  • Clear, litigation-ready reporting
  • Expert witness testimony when required

Why Attorneys Choose Us

A Toxicology Lab Built Around Your Case

Over 16 years of forensic testing experience
Independent laboratory, not affiliated with law enforcement
Proven expertise in DUI blood alcohol and drug reanalysis
Trusted litigation support toxicology lab
Based in Nashville, Tennessee, serving attorneys nationwide

Simple Process

How to Submit a Sample for Retesting

We accept cases nationwide. Nashville-area attorneys can arrange local sample pickup; out-of-state samples ship directly to our lab.

1
Complete the case submission form below and attach the judge’s order authorizing the retest.
2
Tell us what to test for: DUI alcohol (BAC), DUI substance, or both.
3
For out-of-state cases, ship the blood sample on ice to the address below.
4
Our team confirms receipt, scope, and turnaround, then returns litigation-ready results.

Out-of-state shipping

Ship on ice to: ReliaLab Test, 3656 Trousdale Drive, Suite 109, Nashville, TN 37204
Attn: DUI Retest Dept

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Open a Case

Submit Your Case for Retesting

Complete the form to open a case. Please have the following ready:

  • The judge’s order authorizing the retest (PDF or image)
  • Whether to test for DUI alcohol (BAC), DUI substance, or both
  • Contact details for your office
  • Contact details for the individual being retested

Attorney name(Required)
Individual being retested
State where the case originates(Required)
What to test for(Required)
Sample logistics(Required)
Drop files here or
Max. file size: 25 MB.

    Forensic Toxicology

    Available DUI/DUID Test Panels

    These panels support DUI/DWI retesting for defense attorneys and are ordered directly through our office, so we can match the analysis to the judge’s order and your defense strategy.

    Blood (Quantitative)

    DUID Routine Panel

    Forensic analysis of common illicit and prescription drugs. Includes amphetamines/methamphetamine (including MDMA/MDA), cocaine and metabolite, opiates, fentanyl, phencyclidine (PCP), barbiturates, benzodiazepines, oxycodone, and methadone.

    Blood (Quantitative)

    Expanded Panel + DUID ToxPath

    Amphetamines, barbiturates, benzodiazepines, buprenorphine, carisoprodol/meprobamate, cocaine, fentanyl/norfentanyl, marijuana (THC), methadone, opiates, oxycodone/oxymorphone, PCP, volatiles, tramadol, zolpidem, opioids, narcotic analgesics, stimulants, antidepressants, antipsychotics, antihistamines, anxiolytics, anticonvulsants (gabapentin), antihypertensives, muscle relaxants, antitussives, sedatives/hypnotics, dissociative anesthetics, hallucinogens, TCAs, and cardiac drugs.

    Must order the DUID Routine Panel first.

    Blood (Quantitative)

    Expanded Panel

    Amphetamines, barbiturates, benzodiazepines, buprenorphine, carisoprodol/meprobamate, cocaine, fentanyl/norfentanyl, marijuana (THC), methadone, opiates, oxycodone/oxymorphone, PCP, volatiles, tramadol, zolpidem, opioids, narcotic analgesics, stimulants, antidepressants, antipsychotics, antihistamines, anxiolytics, anticonvulsants (gabapentin), antihypertensives, muscle relaxants, antitussives, sedatives/hypnotics, dissociative anesthetics, hallucinogens, cardiac drugs, and TCAs.

    Blood or Urine (Quantitative)

    Alcohol DUI/DUID Testing (BAC)

    Forensic blood alcohol concentration analysis in blood or urine.

    Blood or Urine (Quantitative)

    Premium Cannabinoids

    Forensic analysis of marijuana (THC), CBD, CBN, Delta-8, Delta-9, and Delta-10.

    Blood or Urine (Quantitative)

    Abused Specific Drug Screen / Confirmation / Level

    Immunoassay, liquid chromatography mass spectrometry (LCMS), and gas chromatography mass spectrometry (GCMS) screening for a specific drug from a biological matrix, with determination and quantitative concentration of the primary drug and metabolite.

    Blood (Quantitative)

    Volatiles Panel

    Forensic analysis of ethyl alcohol, acetone, isopropanol, and methanol.

    Blood (Quantitative)

    THC (Qualitative + Confirmation)

    Forensic analysis of marijuana (THC).

    Blood or Urine (Quantitative)

    Drug-Facilitated Crime Expanded Panel

    Amphetamines, barbiturates, benzodiazepines, buprenorphine, carisoprodol/meprobamate, cocaine, fentanyl/norfentanyl, marijuana (THC), methadone, opiates, oxycodone/oxymorphone, PCP, volatiles, tramadol, zolpidem, opioids, narcotic analgesics, stimulants, antidepressants, antipsychotics, antihistamines, anxiolytics, anticonvulsants (gabapentin), antihypertensives, muscle relaxants, antitussives, sedatives/hypnotics, dissociative anesthetics, hallucinogens, TCAs, and cardiac drugs.

    To order a panel, submit the case form above or call our office at (615) 332-8838.

    The Best Defense Is a Good Offense

    Don’t accept the prosecution’s chemical test at face value.

    DUI/DWI retesting for defense attorneys gives you the scientific foundation to dispute results and protect your client’s rights.