Both pupils are measured under normal room light, then the lights are turned out for about 90 seconds to allow the suspects pupils to adapt to the darkness. Then the suspects eyes are measured again using a pen light under three lighting conditions. The first being low light, then indirect light, and finally direct light. Examination for Muscle Tone . The DRE checks the muscle tone in the suspects arms.
Some drugs cause the muscle to be very flaccid, or loose and rubbery.
Others cause a rigid stiff or tense feeling in the muscles. Examination for Injection Sites . The DRE carefully inspects the suspect's arms, hands, fingers, etc. for signs of recent or past hypodermic needle injections. Suspect's Statements and Other Observations . At this point the DRE should have determined if the suspect is impaired and if so, the DRE should have a clear opinion of the category or combination of categories of drugs affecting the suspect.