Aggravated Assault by Vehicle While DUI in Pennsylvania


Being charged with Aggravated Assault by Vehicle While DUI does not mean the government can automatically convict you.

Prosecutors must prove far more than the fact that an accident occurred. They must establish that you were driving under the influence, that the alleged impairment caused the accident, and that the accident resulted in what Pennsylvania law considers serious bodily injury.

At Manchester & Associates, we defend these complex felony cases throughout Pennsylvania by closely examining every aspect of the prosecution’s evidence, including blood testing, forensic toxicology, accident reconstruction, witness statements, and the medical evidence surrounding the alleged injuries.

What Is Aggravated Assault by Vehicle While DUI?

Pennsylvania’s Aggravated Assault by Vehicle While DUI statute applies when prosecutors claim that a person was driving under the influence, that the alleged DUI caused a traffic accident, and that another person suffered serious bodily injury as a result.

This offense is far more serious than a standard DUI charge. A conviction can lead to significant prison exposure, lengthy license consequences, and a permanent felony record. However, the government must still prove every element beyond a reasonable doubt.

What the Prosecution Must Prove

To obtain a conviction, the Commonwealth must establish three separate components.

1.

You Were Driving Under the Influence

The prosecution must first prove impairment under Pennsylvania’s DUI laws. This typically involves evidence such as blood test results, alcohol concentration levels, drug testing, officer observations, and statements allegedly made by the accused. If the DUI allegation cannot be proven, the aggravated assault charge may fail as well.

2.

The Alleged DUI Caused the Accident

Causation is often one of the most important issues in these cases. The mere fact that an accident occurred while someone was under investigation for DUI does not automatically mean impairment caused the collision.

A proper defense looks closely at the surrounding circumstances, including road and weather conditions, possible mechanical failures, the actions of other drivers, traffic control devices, visibility issues, and any accident reconstruction evidence. In many cases, these factors can significantly affect how the accident is understood.

3.

The Injury Must Qualify as Serious Bodily Injury

Not every injury meets Pennsylvania’s legal definition of serious bodily injury. The government must prove that the injuries involved a substantial risk of death, serious permanent disfigurement, or a protracted loss or impairment of a bodily function or organ. Medical records and expert testimony often play a critical role in determining whether this standard has been met.

Challenging the DUI Allegation

Many Aggravated Assault by Vehicle While DUI cases depend heavily on the strength of the DUI evidence.

Blood Testing Issues

Laboratory testing is not infallible. Problems can arise from improper procedures, chain-of-custody concerns, calibration issues, laboratory errors, or flawed interpretation of results. A careful review of the underlying data often reveals information that does not appear in the government’s summary reports.

Hospital Blood Testing

Hospital blood tests are typically conducted for medical purposes rather than forensic use. As a result, questions may arise regarding testing methodology, laboratory certification, collection procedures, and whether the results are reliable for use in a criminal prosecution. These issues should be thoroughly examined before accepting the government’s conclusions.

Accident Reconstruction Can Be Critical

The prosecution often relies on accident reconstruction evidence to establish causation, but that evidence should not be accepted without scrutiny.

A proper defense involves reviewing reconstruction reports, examining scene evidence, inspecting roadway conditions, reviewing any available surveillance footage, interviewing witnesses, and, when appropriate, consulting independent reconstruction experts. In some cases, evidence discovered at the scene can significantly change how the accident is interpreted.

Common Defenses

Every case is unique, but defenses often focus on challenging the reliability of blood or drug testing, questioning accident reconstruction conclusions, demonstrating that another factor caused the accident, disputing whether the injuries meet the legal definition of serious bodily injury, exposing weaknesses in witness testimony, or seeking to suppress unlawfully obtained evidence. The appropriate strategy depends entirely on the specific facts of the case.

Penalties for Aggravated Assault by Vehicle While DUI

Aggravated Assault by Vehicle While DUI is a second-degree felony under Pennsylvania law. A conviction can carry up to 10 years in prison, substantial fines, a permanent felony record, and other serious consequences, including the loss of driving privileges.

The actual sentence imposed depends on many factors, including the circumstances of the accident, the extent of the injuries, the defendant’s criminal history, and Pennsylvania’s sentencing guidelines. In some cases, additional charges arising from the same incident can significantly increase the potential penalties.

Because these cases often involve complex scientific evidence and high-stakes felony allegations, it is important to begin evaluating the evidence and developing a defense as early as possible.

Why Early Investigation Matters

Evidence can disappear quickly after a serious accident. Surveillance footage may be overwritten, witness memories can fade, road conditions may change, and physical evidence can be lost. Beginning a defense investigation early often provides opportunities that may no longer exist later in the case.

Frequently Asked Questions

Is an accident enough to prove aggravated assault by vehicle while DUI?

No. Prosecutors must prove far more than the occurrence of an accident.

Can I be convicted if someone else caused the collision?

Potentially not. Causation is a critical element of the offense.

Does a hospital blood test automatically prove DUI?

No. Hospital testing can present significant evidentiary and scientific issues.

What qualifies as serious bodily injury?

Pennsylvania law applies a specific legal definition, and not every injury meets that standard.

Should I hire an attorney immediately?

These cases often involve scientific evidence, accident reconstruction, and extensive investigation, so early representation is usually beneficial.

Is Aggravated Assault by Vehicle the same as Aggravated Assault by Vehicle While DUI?

No. Pennsylvania has separate offences. Aggravated Assault by Vehicle generally involves serious bodily injury caused through reckless or grossly negligent violations of the Vehicle Code that do not rely upon DUI. Aggravated Assault by Vehicle While DUI requires prosecutors to prove that the alleged DUI caused the accident and resulting serious bodily injury.

Speak With A Defense Attorney


Aggravated Assault by Vehicle While DUI allegations require a thorough examination of the science, the accident evidence, and the law.

Manchester & Associates has defended serious DUI-related felony cases throughout Pennsylvania for decades.

Contact us today for a free consultation.