Being charged with DUI causing injury under California Vehicle Code section 23153 is a serious matter. Unlike a standard DUI, a violation of §23153 is a felony-level offense in many cases and carries the potential for significant prison time, long license suspensions, restitution, and life-altering consequences.

What many people do not realize, however, is that a charge under §23153 is far from automatic simply because an accident occurred and alcohol or drugs were involved. The law imposes specific elements that the prosecution must prove beyond a reasonable doubt. If the prosecution fails to prove even one of these elements, the charge cannot stand.

Understanding these elements is critical for anyone accused of DUI causing injury and highlights why a strong defense can make all the difference.

What Is Vehicle Code §23153?

Vehicle Code §23153 applies when the prosecution alleges that a defendant caused bodily injury to another person while driving under the influence of alcohol, drugs, or a combination of both.

The statute applies not only to vehicles, but also to vessels, and it covers impairment caused by:

• Alcohol

• Drugs (including prescription medications)

• A combination of alcohol and drugs

This charge is commonly filed after traffic accidents involving injuries, but the presence of an injury alone does not establish guilt.

The Four Elements the Prosecution Must Prove

To convict a defendant of DUI causing injury under Vehicle Code §23153, the prosecution must prove all four of the following elements beyond a reasonable doubt:

1. The defendant drove a vehicle (or operated a vessel);

2. At the time of driving, the defendant was under the influence of alcohol, drugs, or both;

3. While under the influence, the defendant committed an illegal act or failed to perform a legal duty; and

4. That illegal act or failure caused bodily injury to another person.

Each element presents opportunities for the defense to challenge the prosecution's case.

Element One: Driving a Vehicle or Operating a Vessel

The first element may appear straightforward, but it is not always uncontested. The prosecution must prove that the defendant was actually driving or operating the vehicle at the time of the alleged offense.

Issues can arise when:

• There is a dispute over who was driving

• Multiple occupants were present

• The defendant was found near, but not inside, the vehicle

• The vehicle was disabled or not in motion

Injury cases often involve chaotic accident scenes, unreliable eyewitness accounts, or assumptions by law enforcement. Establishing who was actually driving is not always as clear as the police report suggests.

Element Two: Under the Influence

The second element requires proof that the defendant was under the influence at the time of driving. Being under the influence means that alcohol, drugs, or both impaired the defendant's ability to operate a vehicle with the caution of a sober person.

This does not automatically mean:

• A specific blood alcohol concentration proves guilt

• A positive drug test equals impairment

• Prescription medication use is unlawful

Field sobriety tests, chemical tests, and officer observations are all subject to challenge. Factors such as improper testing procedures, faulty equipment, medical conditions, fatigue, or even anxiety can all affect perceived impairment.

In drug and combination DUI cases, the prosecution often struggles to establish actual impairment, as opposed to mere presence of a substance.

Element Three: An Illegal Act or Failure to Perform a Legal Duty

This element is one of the most misunderstood—and one of the most powerful for the defense.

The prosecution must prove that while under the influence, the defendant:

• Committed an illegal act (such as speeding or running a red light), or

• Failed to perform a legal duty (such as yielding the right of way)

Importantly, being under the influence alone is not enough. The prosecution must identify a separate traffic violation or legal failure that occurred in addition to the alleged impairment.

Common defense issues include:

• The alleged traffic violation never occurred

• The violation was committed by another driver

• Road conditions, lighting, or signage caused the incident

• The defendant acted reasonably under the circumstances

If there is no provable illegal act or failure to perform a legal duty, the charge under §23153 fails—even if impairment is alleged.

Element Four: Causation of Bodily Injury

The final element requires proof that the defendant's illegal act or failure caused bodily injury to another person.

This is a crucial point:

The injury must be caused by the unlawful act—not merely associated with the accident.

Injury cases often involve:

• Minor or disputed injuries

• Pre-existing medical conditions

• Injuries caused by another driver's conduct

• Intervening events unrelated to the defendant's actions

The prosecution must show a direct causal connection between the defendant's conduct and the injury. If the injury would have occurred regardless of the defendant's actions, or if another driver was at fault, this element is not satisfied.

Why These Cases Are Highly Defensible

DUI causing injury cases are complex and fact-intensive. Police reports often oversimplify causation, impairment, and fault, while prosecutors frequently assume that alcohol plus injury equals guilt.

In reality, these cases often hinge on:

• Accident reconstruction

• Expert testimony

• Medical records

• Officer credibility

• Independent witness statements

When properly analyzed, many §23153 cases reveal reasonable doubt that can lead to reduced charges, dismissals, or acquittals.

The Importance of an Aggressive Defense

A conviction under Vehicle Code §23153 can result in:

• State prison exposure

• Lengthy license suspension

• Strike consequences in some cases

• Substantial fines and restitution

• Permanent damage to employment and reputation it.