Toxicology Services

CBI Forensic Services (CBI-FS) is proud to offer all Law Enforcement Agencies and Coroners/Medical Examiners toxicology testing at no cost. CBI-FS has the ability to and will analyze all cases for both Blood Alcohol content (BAC) and Drugs of Abuse (DOA).

Toxicology Testing  Toxicology FAQs

The Toxicology Laboratory



In order to effectively service the criminal justice system and the citizens of Colorado, the Colorado Bureau of Investigation Forensic Services conducts Toxicology analysis at three locations:


Denver Forensic Science Laboratory

Phone Number: 303-463-7000


Grand Junction Forensic Science Laboratory

Phone Number: 970-248-7500


Pueblo Forensic Science Laboratory

Phone Number: 719-647-5999




The Colorado Bureau of Investigation Forensic Services-Toxicology Section is accredited by ANSI National Accreditation Board (ANAB).  Accreditation as a Forensic Testing Laboratory is based on ISO/IEC 17025: 2017 and the ANAB 17025:2017 Forensic Science Testing and Calibration Accreditation Requirements.

In addition, CBI-Toxicology maintains State certification from the Colorado Department of Health and Environment (CDPHE) to perform human performance and postmortem toxicology.


Blood Collection Kits


Blood collection kits can be ordered through two vendors: Arrowhead Forensics (800-953-3274) or TriTech Forensics (800-438-7884)



Catalog numbers (Arrowhead Forensics)

A-BA-CBI-D for Denver Laboratory mailing address

A-BA-CBI-GJ for Grand Junction Laboratory mailing address

A-BA-CBI-P for Pueblo Laboratory mailing address


Catalog numbers (TriTech Forensics)

BA-0CO-D for Denver Laboratory mailing address

BA-0CO-W for Grand Junction Laboratory mailing address

BA-0CO-P for Pueblo Laboratory mailing address


If unsure of which catalog number to order, please contact a CBI laboratory for assistance.

FAQ's with map



Drug-Facilitated Crimes (DFC)

These blood/urine collection kits can be ordered through TriTech Forensics, 800-438-7884.

Catalog number: BU-DFRE(CO)



Drug Effect Monographs

The drug monographs are for attorneys to reference or discover before trial. The monographs outline a CBI Toxicologist’s general testimony about the potential effects of the drug(s) detected.  However, these monographs can used by anyone seeking information about commonly detected drugs and their potential impact on human performance and behavior.

The general information summarized in these monographs may include therapeutic range, half-life, metabolism and general effects.  

If you have additional questions regarding toxicology results for your case, please email the author of the toxicology report.  


Drug Monographs

Alcohol General Effects

Alcohol and THC General Effects

Alprazolam General Effects

Amphetamine General Effects

Buprenorphine and Norbuprenorphine General Effects

Butalbital General Effects

Carisoprodol and Meprobamate General Effects

Clonazepam General Effects

Cocaine General Effects

Designer Benzodiazepines (Clonazolam, Etizolam, Flualprazolam, Flubromazolam) General Effects

Diazepam, Nordiazepam, Oxazepam, and Temazepam General Effects

Difluoroethane (DFE) General Effects

Fentanyl General Effects

GHB General Effects

Hydrocodone and Hydromorphone General Effects

Lorazepam General Effects

Methadone General Effects

Methamphetamine General Effects

Morphine, Codeine, and Heroin General Effects

Oxycodone and Oxymorphone General Effects

THC General Effects

Tramadol General Effects

Zolpidem General Effects






Forensic Toxicologist Curriculum Vitae

Denver Laboratory:





M. MacDonald



T. Vidaurri

E. Yildiz


Grand Junction Laboratory:





Pueblo Laboratory:



O. Fowler




Expert Disclosure Reports (Rule 16)

If an attorney requires the Toxicologist to complete an expert disclosure report, the attorney will need to email the Toxicologist who authored the laboratory report and include the police report. The Toxicologist will review the police report and form an opinion regarding the behavior in the police report in relationship to the drugs detected.

Please remember, in general, a drug concentration cannot be directly correlated to a level of impairment.  Tolerance, drug-drug interaction, and drug history all affect an individual differently.  An expert disclosure report is not necessary in every case, and all CBI Toxicologists are able to testify as expert witnesses to the effects of alcohol and the drugs detected on human performance and behavior. 

The approximate turnaround time for a full expert disclosure report is four (4) weeks.

Blood Alcohol Concentration (BAC) Retrograde Extrapolation Report

Available upon written request. Please contact the author of the toxicology report.