Herreth Law
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DUI Archives

Some Often-Overlooked DWI Defenses

breathalyzer.jpegIn most DWI defense matters, intoxication is the only issue. The state can use either direct or circumstantial evidence to prove intoxication. A chemical test that shows a BAC above the legal limit is proof of intoxication as a matter of law. Or, the prosecutor can rely on the circumstantial evidence from the field sobriety tests.

How Accurate Are Breathalyzer Tests?

breath results.jpegToday's Breathalyzer is based on the Drunk-O-Meter, which appeared in the 1930s. So, the Breathalyzer is a very well-established piece of technology. However, the Breathalyzer has also not changed very much since those early models. Thus, the flaws inherent in those early models still remain today.

The Difference Between Blood Tests and Breath Tests

intox9000.jpegBreathalyzers make up the vast majority of DWI chemical tests in Texas. Since the Supreme Court ruled that blood tests require search warrants, that will probably remain true for quite some time. Occasionally, Texas law enforcement agencies hold "no-refusal weekends." If drivers refuse Breathalyzer tests, officers will obtain search warrants for blood tests. So, you can refuse a chemical test, and that refusal is effective until they strap you onto a gurney and stick a needle in your arm.

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