Archive for DUI Enforcement

DUI Training – One Leg Stand

by Aaron

[Ed. note - This is part V of a DUI Training series. This training article is on the Walk and Turn test.  Prior articles covered Horizontal Gaze Nystagmus, Walk and TurnVehicle in Motion and Personal Contact.]

One Leg Stand

Photo courtesy of Jeffrey Smith

The One-Leg-Stand (OLS) test is the final validated test in the NHTSA approved battery of three sobriety tests. Like the other two tests, the OLS is a divided attention test, meaning the subject being tested must divide their attention on several different instructions to successfully complete the test.

Operating a motor vehicle safely requires the driver to divide their attention (multi-task) on a continuous basis. You should familiarize yourself with with this concept as it helps a judge or jury understand that these tests are not meant to “fail” the tested subject, but are meant to gauge their ability to perform multiple tasks at the same time – something a sober driver does all the time.

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Categories DUI Enforcement, Patrol, Training
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DUI Training[Ed. note - This is part IV of a DUI Training series. This training article is on the Walk and Turn test.  Prior articles covered Horizontal Gaze Nystagmus, Vehicle in Motion and Personal Contact.]

In this fourth article on the standardized field sobriety tests (SFST), I will review the Walk-and-Turn (WAT) test which is the second test in the NHTSA approved 3-test battery. The final SFST is the OLS – One Leg Stand test, and I’ll have a future article on that test soon.

The WAT is another important test in determining sobriety or lack thereof. As with the other NHTSA tests this test has a strict way of instructing and performing an example of the WAT. As with any of the tests I recommend to officers I instruct to take their time, focus, and learn to move right through moments of memory loss like it was a planned event. There is probably nothing more intimidating and frustrating to an officer than to appear flustered to a suspect. It WILL happen – let me teach you to overcome that fear and nail these tests.

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DUI Training - HGN[Ed. note - This is part III of a DUI Training series. This training article is on horizontal gaze nystagmus. Prior articles covered Vehicle in Motion and Personal Contact.]

The next step in the investigation of impaired drivers is to have them exit the vehicle for the Standardized Field Sobriety Tests (SFST).

The Frye standard, Frye test, or general acceptance test is a test to determine the admissibility of scientific evidence. It provides that expert opinion based on a scientific technique is admissible only where the technique is generally accepted as reliable in the relevant scientific community.

To overcome the scientific requirements of United States v. Frye, the National Highway Transportation and Safety Administration (NHTSA) funded scientific research on sobriety tests starting back in the 1970’s. The results were the three “standardized and validated” field sobriety tests that most of us in police work have become the most familiar with. “Validated” means that a scientific study confirmed that the tests do in fact work to identify impaired drivers.

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[Ed. note - This is the second part of a series on DUI Training.  This article deals with phase II of the drunk driving investigation.]

PHASE II – PERSONAL CONTACT

DUI TrainingHere is where we begin to see officers dropping the ball. And this part of the investigation may be the most critical in the entire process. We get so used to “routine” traffic stops, that we fail to observe some of the best evidence of impairment that we’re going to get – during the initial contact with the driver.

Remember, that at this point the drunk (or other criminal) is in panic mode, and is at the greatest potential for producing evidence due to nerves. They still feel somewhat comfortable in their car however, and can give you all you need for conviction. Once you ask them out, you are less likely to get the spontaneous observations than while they’re in the car.

This phase begins the moment you exit the patrol car, not when you’re talking to the driver. As you approach what do you see, smell, hear. You’d be surprised how often someone will ditch their beer can in the back seat, or you’ll hear them blurt out “I’m drunk.”  Most officers are like “oh yeah” and let their guard down a little, which means their observations and notes for the report drop off too. These are big pieces to a big puzzle that has to be played out in your report.

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Categories DUI Enforcement, Training
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[Ed. note:  This is part one of a series on DUI training and detection.  The author is a NHTSA certified SFST instructor and DRE instructor.  Additionally, he spent several years in a DUI task force.]

DUI TrainingRecently I was talking to some officers about the finer skills of detecting impaired drivers, and I got a lot of glassy eyed looks in return. The one area that turns more cops away from DWI enforcement (other than the time and paperwork required) is the Standardized Field Sobriety Tests (SFST). Most cops avoid getting into a situation that may make them look flustered, more than a preacher avoiding a porno shop. Hopefully I can dispel some of those distastes in this series of articles and get more cops stopping the human torpedoes on the roadways.

Just a little bio information on me so you know where I’m coming from.

I’m an SFST instructor, have been a DRE (Drug Recognition Expert) and DRE instructor (both for 10 years), spent 2.5 years specifically as a DWI enforcement officer, and worked 2 years in undercover investigations for a HIDTA drug task force.

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