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Understanding DUI Scientific Evidence

This product provides an insider's perspective on the evolving technologies and procedures associated with the evidence associated with driving under the influence (DUI) charges. Leading defense attorneys guide the reader through the key stages and steps involved in successfully defending a client accused of driving while under the influence.

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DUI DWI Drug or Drugs Arrests - Drugged Driving Impairment Chart

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INDICATORS OF DRUG IMPAIRMENT:

GENERAL INDICATORS OF IMPAIRMENT: Depressants Stimulants PCP Hallucinogens Narcotics Inhalants THC
Odor of Drug/Chemical     x       x
Thick or Slurred Speech

x

   x x x x  
Sluggish/Sedated x       x   x
Euphoria   x x   x    
Disorientation x   x x   x x
Muscle Rigidity.     x x      

 

PSYCHOPHYSICAL INDICATORS OF IMPAIRMENT: Depressants Stimulants PCP Hallucinogens Narcotics Inhalants THC
Divided Attention Impairment x x x x x x x
Poor Balance/Coordination x     x x x x
Slow Internal Clock x   x       x
Accelerated Internal Clock   x          
Rapid/Jerky Movements   x          
Rapid Heartbeat   x   x      
Body Temperature down arrow up arrow up arrow up arrow down arrow up-down arrow up arrow
Pulse down arrow up arrow up arrow up arrow down arrow up arrow up arrow
Blood Pressure down arrow up arrow up arrow up arrow down arrow up-down arrow up arrow

 

EYE INDICATORS OF IMPAIRMENT: Depressants Stimulants

PCP

 Hallucinogens Narcotics Inhalants

THC
Horizontal Gaze Nystagmus x   x     x  
Vertical Gaze Nystagmus x /N   x     x  
Dilated Pupils   x   x   x x /N
Constricted Pupils         x    
Light Sensitivity   x          
Bloodshot Red Eyes x           x
Difficulty Focusing   x         x
Blank Stare/Dazed     x x   x  
Droopy Eyelids x       x    
Reaction to Light SLOW SLOW NORMAL SLOW LITTLE SLOW NORMAL
Last Updated: 1/22/03.

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