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Breath Machines & Field Sobriety Tests

Experienced DUI Defense in Southeast Pennsylvania

Did law enforcement have probable cause to stop you? Were the field sobriety tests you were given administered properly? Was the breath machine they tested you on properly calibrated and was the officer who used it currently certified to do so?

At Ross & Schnarrs, we know what questions to ask and how to effectively defend people who have been charged with drunk driving in southeastern Pennsylvania. Today, our experience with DUI cases, the credibility we've established with prosecutors and courts in this area, and our knowledge of how to make the system work for the people we represent can start working to benefit you.

Challenging Field Sobriety Test
and Blood-Alcohol Test Results

Law enforcement personnel in the Commonwealth of Pennsylvania use a variety of field sobriety tests to establish probable cause for DUI arrests and breath, blood or urine testing. Standard tests used by law enforcement include:

  • The one-leg stand test
  • The walk-and-turn test
  • The HGN (horizontal gaze nystagmus) test

Non-standard (no established procedures for administering, results highly subjective) tests include:

  • The finger-to-nose test
  • The recite the alphabet test
  • The counting backwards test

With experienced attorneys representing you (like the ones you'll have at our firm), both standard and non-standard field sobriety tests can be challenged — effectively, in many cases. We can challenge blood-alcohol content (BAC) test results obtained from breathalyzer or Intoxilyzer machines and BAC results obtained from blood or urine samples as well.

In short, don't assume that the evidence against you is as strong and incontrovertible as the police or prosecutors say. Talk to an experienced lawyer first.

Contact Ross & Schnarrs Today

Our law firm provides experienced, effective DUI defense on behalf of people in the Pottstown area and the surrounding portions of southeast Pennsylvania. To speak to an experienced attorney — call or contact us today.

Office Locations

Ross & Schnarrs
Security Trust Building, 152 East High Street, Suite 100
High & Hanover Streets
Pottstown, PA 19464
Phone: 610-323-5300
Fax: 610-323-6081
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Norristown office
618 Swede Street
Norristown, PA 19401
Phone: 610-275-3500
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West Chester office
27 Darlington Street
West Chester, PA 19382
Phone: 610-692-8800
Map and Directions