DUI Testing and Sobriety Monitoring

What Does "BAC" Mean?

In every state, you can get a DUI if you drive with BAC of .08% or more. And an especially high BAC can increase the already-severe penalties for DUI. But what exactly does “BAC” mean? “BAC” is short for “blood alcohol concentration”—a measurement of how much alcohol is in a person’s blood.

Preliminary Alcohol Screening (PAS) Devices

To lawfully arrest a motorist for DUI, an officer must have probable cause to believe the person was driving while under the influence of drugs or alcohol. Police often use PAS breathalyzers to build probable cause.

DUI Alcohol Breathalyzer Tests

Read about the breathalyzers that police use in DUI cases to prove a driver's blood alcohol concentration (BAC) in court, and the consequences of refusing a breath test.

DUI Field Sobriety Tests (FSTs) and Your Legal Rights

Learn how police use field sobriety tests (FSTs) to assess whether a driver has had to too much to drink.

What Is a Drug Test Patch?

Drug testing is an important component of the criminal justice system. And there are lots of ways of detecting drug use. Some law enforcement agencies are now using drug-test patches as an alternative to more traditional methods like blood, urine, and hair-follicle testing.  

Horizontal Gaze Nystagmus (HGN) Sobriety Test: Is it Reliable?

Field sobriety tests are often used by police during DUI stops. One of these tests is the horizontal gaze nystagmus test. Here's how it works.

BAC Calculator: Estimate Your Blood Alcohol Concentration

Use the blood alcohol level calculator to estimate your blood alcohol concentration (BAC) for a given number of drinks.

DUI Blood Alcohol Testing

Most DUI investigations involve either blood being drawn or a breath test being taken. This article addresses some of the issues that arise regarding blood testing.

What Happens If I Fail a DUI Field Sobriety Test?

A field sobriety test is used by police officers to access if you are driving under the influence of an illicit substance. There are a few possible repercussions to failing a sobriety test.

Blood Alcohol Level Chart: Are You Too Drunk to Legally Drive?

Use the blood alcohol level chart to estimate how many drinks it takes to put your blood alcohol concentration (BAC) above the legal limit.

Implied Consent and DUI: What Happens If You Refuse a Chemical Test or Field Sobriety Tests?

If you get pulled over for a DUI and the officer asks you to take a blood, breath, urine, or field sobriety test, do you have to? What happens if you refuse?

Ignition Interlock Devices: Costs and Requirements

Read about how ignition interlock devices (IIDs) work, how much IIDs cost, and what happens if you try to evade detection by tampering with or tricking an IID.

What Is a Drug Test Patch?

Drug testing is an important component of the criminal justice system. And there are lots of ways of detecting drug use. Some law enforcement agencies are now using drug-test patches as an alternative to more traditional methods like blood, urine, and hair-follicle testing.  

Alcohol Monitoring and SCRAM Systems

Ankle bracelets are often used for monitoring the location of a criminal defendant who has either been released on bail or, after being convicted, is on probation. Many of these bracelets are also equipped with technologies that allow them to monitor the alcohol consumption of the wearer. Read about how these alcohol-monitoring bracelets work and when they're required