Practice Areas

• Accessory After the Fact
• Arson
• Assault & Battery
• Battery on a Peace Officer
• Assault with a Firearm
• Battery
• Assault with a Deadly Weapon
• Bail Review & Reduction
• Carrying a Concealed Weapon
• Child Endangerment
• Conspiracy
• Criminal Threats
• Domestic Violence
• Driving with A Suspended License
• Drug Possession
• Marijuana Possession for Sales
• Drug Possession for Personal Use
• Drug Possession for Sale
• DUI Defense
• I've been arrested for DUI. What happens to my Driver's License?
• DUI Under 21
• The 'Rising Blood Alcohol' Defense
• The "No Driving" Defense
• I've been arrested & cited for DUI? What happens next?
• Attacking the Blood Test
• Elder Abuse
• Embezzlement
• Expungements
• Hit and Run
• Housing Violations
• Juvenile Defense
• License Defense
• Nursing License Defense
• Murder
• Police Misconduct Litigation
• Pre-Filing Investigations
• Professional & Vocational License Defense
• Prostitution
• Public Intoxication
• Sex Crimes
• Indecent Exposure
• Solicitation of Prostitution
• Rape
• Theft Charges
• Robbery
• Purse Snatching
• Burglary
• Petty Theft
• Embezzlement
• Identity Theft
• Three Strikes Law
• Vacating Convictions
• Deportable Offenses: Vacating Your Guilty Plea to Avoid Deportation
• Vandalism
• Vehicular Manslaughter
• Warrant Recall
• Weapons Charges
• Witness Intimidation

Attacking the Breath Test

There are a number of ways in which an experienced DUI attorney can attack chemical test results. Remember, the BAC Datamaster and the Intoximeter EC/IR, the primary evidentiary breath-analyzing devices used in the greater Los Angeles area, are just machines. As machines, breath alcohol testing devices have flaws, and their results should always be suspect. Your car can break down, your computer hard drive can crash, and breath alcohol testing equipment can be faulty.

Malfunctions and defects relating to the equipment used to gauge your blood alcohol concentration can generate readings that are both inaccurate and unfavorable. Physical and medical factors and conditions can also produce falsely high results. These include, but are not limited to, hypoglycemia, gastroesophageal problems (such as Gastrointestinal Reflux Disorder, or "GERD"), the use of amphetamines, spiking blood sugar levels caused by diabetes, the production of isopropyl alcohol in your blood from eating a diet low on carbohydrates, inordinately slow or rapid rate of metabolism, body fat, and a host of other conditions and physiological phenomena.

Our Los Angeles DUI lawyers will never simply assume that breath results are accurate. We will thoroughly interview you regarding your medical history and lifestyle to determine whether any foreign substance or pre-existing medical condition may have affected your breath alcohol test results.

In a breath test, all accuracy records, maintenance logs, and usage logs for the machine in question should be carefully evaluated by an experienced professional, to determine whether or not the breath test equipment was in compliance with Title 17 of the Administrative Code. The breath testing device checklist and all materials referenced by the checklist, including the certification and qualifications of the operator must be carefully scrutinized. Our experienced Los Angeles DUI attorneys will obtain and examine all of these records while preparing a defense for your case.

Our Los Angeles DUI lawyers have a combined experience of more than 50 years defending persons accused of DUI. Our founding partners, Bruce McGregor and Robert Ernenwein, are former Los Angeles Deputy District Attorneys. Robert Ernenwein, one of our Co-founders, is Certified as a Criminal Law Specialist by the California State Bar Board of Legal Specialization.. Robert Ernenwein and Bruce McGregor have both been named "Super Lawyers" by Los Angeles Magazine. Robert Ernenwein has appeared as a legal analyst on multiple cable news programs, including Fox News. The experience and capabilities of the lawyers at McGregor & Ernenwein are unmatched.

 
We represent individuals accused of DUI in Alhambra, Arcadia, Artesia, Avalon, Azusa, Baldwin Park, Bell, Bell gardens, Bellflower, Beverly Hills, Burbank, Calabasas, Carson, Cerritos, City of Industry, Claremont, Commerce, Compton, Covina, Cudahy, Culver City, Diamond Bar, Downey, Duarte, Eagle Rock, East Los Angeles, El Monte, El Segundo, Gardena, Glendale, Glendora, Hawaiian Gardens, Hawthorne, Hermosa Beach, Hollywood, Hollywood Hills, Huntington Park, Inglewood, Inland Empire, Irwindale, La Canada Flintridge, La Habra Heights, La Mirada, La Puente, La Verne, Lakewood, Lancaster, Lawndale, Lomita, Long Beach, Los Angeles, Lynwood, Malibu, Manhattan Beach, Marina Del Rey, Maywood, Monrovia, Montebello, Monterey Park, Norwalk, Palos Verdes Estates, Paramount, Pasadena, Pico Rivera, Playa Del Rey, Pomona, Redondo Beach, Rolling Hills, Rolling Hills Estates, Rosemead, San Dimas, San Fernando, San Gabriel, San Marino, Seal Beach, Santa Clarita, Santa Fe Springs, Santa Monica, Seal Beach, Signal Hill, South El Monte, South Gate, South Pasadena, Temple City, Torrance, Vernon, Watts, Walnut, West Covina, West Hollywood, Westlake Village, and Whittier. Contact a Los Angeles or Orange County criminal defense attorney at McGregor & Ernenwein at 877-338-4489. The consultation is free and we are available 24 hours a day.

Our phone lines are open 24 hours a day, 7 days a week. Call us now at 877-338-4489 to reserve your free consultation.

Blog for DUI Defense

• Top Questions Regarding Drunk Driving in South Bay

  Description: Were you accused of drunk driving in South Bay, California? If so, you need to read this blog to find answers to some big questions.

• Miranda Rights & Your Los Angeles County DUI Allegation

  Description: Were you informed of your Miranda rights when you were pulled over for DUI? If not, you may be able to beat your DUI in Los Angeles County.

• Paris Hilton’s Brother Must Pay $4.6 Million for Los Angeles DUI Crash

  Description: Have you been charged with DUI in California? Contact the Torrance criminal defense attorneys at McGregor & Ernenwein for help today.

• “Desperate Housewives” Star Arrested on Suspicion of DUI in LA

  Description: Actor Ricardo Chavira was arrested on suspicion of DUI. If you receive a DUI charge, contact the Torrance criminal defense attorneys at McGregor & Ernenwein.

• Rick Springfield Arrested for DUI in Malibu, California

  Description: Singer Rick Springfield was arrested recently on suspicion of DUI. Best known for his 1981 hit “Jessie’s Girl,” Springfield was allegedly administered a field sobriety test and then taken to the Malibu/Lost Hills Police Station. If you have been arrested for DUI, contact the Torrance criminal defense attorneys at McGregor & Ernenwein. We can defend you and walk you through the sentencing options.

• Former California-Based Olympic Gold Medalist Charged with DUI

  Description: In light of the recent arrest of an Olympic gold medalist for a DUI felony, the Torrance criminal defense attorneys at McGregor & Ernenwein have written a blog entry with information regarding bail in DUI cases. Read to find out more, or contact McGregor & Ernenwein today if you have been arrested for DUI.

• Refusing a Blood Alcohol Test after Being Arrested for DUI in California

  Description: California law states that you must take a blood alcohol test after being arrested on the suspicion of drunk driving. However, you still have options and should consider the best path for your case. Call our DUI lawyers today at (888) 338-4489 to learn more about your legal rights.

• Santa Ana Fatal Drunk Driving Car Crash

  Description: According to CBS, police arrested a 27-year-old man from Santa Ana on Tuesday, December 21, 2010 on suspicion of drunk driving and trying to leave the scene of a fatal crash. Our DUI defense lawyers have 50 combined years of experience defending DUIs involving injury or fatality.

• Drive Safe & Sober This Holiday Season

  Description: The holidays are prime time for DUI crackdowns, and getting caught drunk driving is an expensive and costly mistake. Drive sober and safe this holiday season. Call McGregor & Ernenwein today at (877) 338-4489 if you or a family member has been arrested for DUI in South Bay.

• What should I do if I have been arrested for DUI in California?

  Description: What should you do if you face DUI charges in Los Angeles? This article gives you the two main steps you must take, and shows how having an experienced attorney by your side can be invaluable. Call McGregor & Ernenwein Law Offices today to learn more at (877) 338-4489.

Library for DUI Defense:

• You Have Questions Regarding DUI in California, We Have Answers
  Description: Have you been arrested for DUI? Read this article for answers to common questions and contact a Torrance DUI lawyer for help.
• Why the LAPD Might Stop You for Suspected DUI
  Description: Do you know what prompts a police officer to pull someone over for suspected DUI in Los Angeles? Read this article to find out.
• How BAC Can Lead to a Los Angeles DUI
  Description: Blood alcohol level can be impacted by many factors. Read this article to learn more and contact a Torrance DUI attorney. We’ll help you beat your DUI in L.A.
• How to Beat Your DUI in Los Angeles County – 4 Tips
  Description: Want to know how to beat a DUI in Los Angeles County? Read this article to find out & call a Torrance DUI lawyer today.
• Charged with California DUI But Live in a Different State?
  Description: While being from another state can be problematic if you are charged with a DUI in California, certain information regarding your DUI arrest can help your case. Have you or someone you know been arrested for a DUI charge? Contact McGregor & Ernenwein to obtain a completely free consultation with one of our experienced Torrance criminal defense attorneys.
• Women at a Disadvantage for Field Sobriety Tests
  Description: While men are more often charged with DUI than women, women are increasingly receiving such charges as well.
• Understanding the Role of Blood Alcohol Content in California DUI Cases
  Description: Blood alcohol content (BAC), the measure used in DUI arrest cases, is influenced by numerous factors, such as number of drinks, alcohol content of alcohol, time elapsed, your weight, and much more. Call us today at (877) 338-4489 for more information about your case.
• Types of Blood Alcohol Tests in California DUI Cases
  Description: Three primary types of blood alcohol tests are used by police to measure an individual’s level of intoxication: blood tests, urine tests, and breath tests. Contact the DUI attorneys of McGregor & Ernenwein today to learn more about your legal rights in these cases. Call (888) 338-4489.
• Myotonic Dystrophy Can Be Confused with California DUI
  Description: Myotonic dystrophy is a disease with symptoms that look like drunkenness, including glossy eyes, slurred speech, trembling limbs, and more. Call our Torrance DUI defense attorneys today if you or a family member has been wrongly arrested for driving under the influence.
• California Driving Under the Influence (DUI) Arrests Skyrocket during the Holidays
  Description: DUI arrests skyrocket during the holiday season as a result of alcohol-related celebrations, increased travel, and police crackdowns. If you have been arrested for DUI in South Bay, call McGregor & Ernenwein today at (877) 338-4489 to learn more about your legal rights.
• Field Sobriety Tests in California DUI Stops
  Description: Field sobriety tests attempt to quickly measure your level of intoxication, in order to determine if you are driving drunk or not. However, the tests are inherently flawed in how they are designed and conducted, and California residents have a right to refuse to take them. Call us today at (877) 338-4489 to learn more.
• The Types of Serious DUI Arrests in California
  Description: While all types of California DUI charges need to be taken seriously, some carry more severe penalties than others. The three main types of serious Los Angeles DUI charges are listed here. Call us today if you or a loved one has been charged with driving under the influence (DUI) in Los Angeles or Orange County.
• Driving Under the Influence of Alcohol | Vehicle Code 23152(a) & (b)
  Description: Since 1987, we have represented clients in over thousands of DUI in Los Angeles Courts and Orange County courts. We have represented hundreds of clients at DMV hearings and have been victorious at preventing the suspensions of their drivers' licenses. Our founding partners are "Super Lawyers" and former prosecutors. Call us 877-338-4489 for your free DUI consultation.

View All

Case Results for Attacking the Breath Test:

• DUI Charge with High Blood Alcohol Level; Dismissal of DUI & Reduction to Non-DUI Charge

Awarded: Dismissal of DUI in spite of high BAC

Videos about DUI Defense:

• We are Rolling Hills Lawyers: Criminal and DUI Defense for 50+ Combined Years
• Top Torrance DUI and Criminal Defense Lawyers
• Happy Saint Patrick's Day!
• DUI with a Refusal Allegation
• DUI With and Without Injury
• No Driving Defense in a DUI Charge
• What We Do With Blood Tests In DUI Cases
• How To Fight Your Breathalyzer Results
• Fighting a DUI Charge
• Been Arrested For DUI? What Happens Next
• The "Rising Blood Alcohol" Defene