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DRE Training Process and its Prerequisites

DRE Eligibility

  1.  Time in Service:
    a.  3 years commissioned with a minimum of 36 DWI’s or
    b.  Under 3 years commissioned then 72 DWI’s and
  2. Attended a basic SFST course
  3. Attended an ARIDE course
  4. Letter from Chief Law Enforcement Officer from your agency
  5. Completed DRE Application

DRE Instructor

  1. Good standings with DRE program
  2. Minimum of 2 years certified as a DRE
  3. Minimum 25 drug evaluations (not including the 12 from certification training)
  4. Recommended by Regional Coordinator
  5. Letter from Chief Law Enforcement Officer from your agency
  6. Completed application to the Regional Coordinator
  7. Possibly an interview by the Regional Coordinator
  8. Approved by State Coordinator

Course Manager

Set by State Coordinator

The three-phase Drug Evaluation and Classification (DEC) Program includes the following phases:

Phase One: The 16-hour DRE Pre-school, which includes an overview of the DRE evaluation procedures, the seven drug categories, eye examinations and proficiency in conducting the SFSTs.

Phase Two: The 56-hour DRE School which includes an overview of the drug evaluation procedures, expanded sessions on each drug category, drug combinations, and examination of vital signs, case preparation, courtroom testimony, and Curriculum Vitae (C.V.) preparation. At the conclusion of the 7-days of training, the officer must successfully complete a written examination before moving to the third and final phase of training.

Phase Three: During this phase the candidate DRE must complete a minimum of 12 drug evaluations under the supervision of a trained DRE instructor. Of those 12 evaluations, the officer must identify an individual under the influence of at least three of the seven drug categories and obtain a minimum 75% toxicological corroboration rate. The officer must then pass a final knowledge examination and be approved by two DRE instructors before being certified as a certified DRE.


The State of Missouri fully supports the DRE Program due to the number of lives that are lost each year at the hands of impaired drivers.  Although a great number of police officers across the state are trained to detect alcohol–impaired drivers, a smaller number have received the DRE training that enables them to detect drug-impaired drivers.

Being a DRE requires a higher level of dedication and performance in highway safety issues.  The training required to learn the skills of recognizing drug-impaired drivers and detect the drugs causing the impairment is strenuous and demanding.

It is expected of each DRE to not only perform evaluations of their own, but to assist, when possible, other nearby agencies in DRE evaluations.


Candidates for DRE must complete an APPLICATION to be considered for DRE training. The application form provides detailed information about the applicants work history and involvement in impaired driving enforcement.

  1. Recommended/Approved from home agency for DRE training
    Approved by a DRE Regional Coordinator and State Coordinator
    Some DRE training centers also require a board interview prior to being accepted
  2. Two day pre-school
  3. Seven day school
  4. Certification

State Coordinator submits documentation to IACP for certification


As specified in the IACP International Standards of the Drug Evaluation and Classification Program, all drug recognition experts must be recertified every two years following original certification.

To recertify a DRE shall demonstrate continuing proficiency by:

Performing a minimum of four (4) acceptable evaluations since the date of last certification, all of which shall be reviewed and approved by a certified DRE instructor and one (1) of which shall be witnessed by a certified DRE instructor. These evaluations may be performed on subjects suspected of drug and/or alcohol impairment or during class room simulations;


Completing a minimum of eight hours of recertification training since the date of the DRE’s most recent certification, which may alternatively be presented in two sections of no less than four hours, and which shall be consistent with any IACP standards for such training; and
Presenting an updated Curriculum Vitae and rolling log to the appropriate coordinator or his/her designee for review:

All evaluation reports must be entered in the DRE Tracking website.

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