The training was done by police officers who have been trained as trainers.
The first phase of the training is the standardized field sobriety test. During that time, the officers learn about the effects of alcohol and about how to administer and interpret the test. Then they participate in two alcohol correlation workshops. We bring in people and give them alcohol to the point that they are impaired. We then have the students test them under the supervision of an instructor to see if in fact the students are picking up the correct clues and are able to interpret those clues and put them at a blood alcohol concentration of over 80 milligrams percent.
When that course is complete, ideally we want them to go out into the field and utilize those skills to hone them, to get better at them.
Then they come back for the drug recognition expert training program. That consists of two weeks of classroom time. There are another two workshops during which they do more testing. During the second group of workshops, they check pulse and blood pressure as well as do the divided attention test. When that's all complete, they go out and actually test people who are under the influence of drugs.