Anthony Vecchio Quoted by the New York Post on Blood-Alcohol Evidence in the Johnny Gaudreau Case

New Jersey DUI and criminal defense attorney Anthony J. Vecchio was recently interviewed by the New York Post regarding the disputed blood-alcohol evidence in the criminal case arising from the deaths of NHL star Johnny Gaudreau and his brother, Matthew Gaudreau.

The May 3, 2026, article examined a disagreement over how the defendant’s blood sample was tested and whether the reported blood-alcohol concentration accurately reflected the alcohol concentration in his whole blood. Prosecutors alleged a BAC of 0.087%, while the defense argued that the testing involved plasma or serum and that the corresponding whole-blood concentration was closer to 0.075%—below New Jersey’s 0.08% per se limit. The defendant has pleaded not guilty, and the charges remain pending.

[Read the original New York Post article]

Why the Type of Blood Sample Matters

Blood-alcohol evidence can appear straightforward: a laboratory reports a number, the number is compared with the legal limit, and the State presents the result as scientific proof of intoxication.

In reality, blood evidence can involve complicated scientific and legal questions.

Whole blood contains plasma, blood cells and other components. Testing serum or plasma rather than whole blood can produce a different alcohol concentration. When the laboratory did not directly test whole blood, the parties may disagree about whether a conversion was performed, whether the conversion was scientifically reliable and whether the resulting number can fairly be presented as the defendant’s blood-alcohol concentration.

Those issues were central to the dispute covered by the New York Post.

As I explained in discussing the case, a disagreement over the testing method can significantly affect the strength of the prosecution’s scientific evidence. A result slightly above the legal limit takes on a very different meaning when the defense contends that the properly calculated whole-blood result would fall below that limit.

A Disputed BAC Does Not Necessarily End the Prosecution

A successful challenge to a blood-alcohol result does not automatically require dismissal of every intoxication-related charge.

New Jersey’s DWI law permits the State to proceed under more than one theory. A person may be prosecuted for operating with a blood-alcohol concentration of 0.08% or greater, but the State may also attempt to prove that the person operated while “under the influence” based on other evidence.

That other evidence can include:

• The manner in which the vehicle was allegedly operated.
• Statements reportedly made by the driver.
• The odor of alcohol.
• Physical appearance and coordination.
• Performance on field-sobriety exercises.
• Body-camera or dashboard-camera recordings.
• Witness testimony.
• The presence of alcohol containers or receipts.
• The timing and quantity of alleged alcohol consumption.

In the Gaudreau case, prosecutors maintained that they possessed evidence beyond the contested BAC result, including video, field-sobriety evidence and reported admissions about alcohol consumption. The defense, however, argued that the disputed blood result had been presented in a manner that improperly influenced the grand jury’s consideration of the case.

The result is an important distinction: weakening the BAC evidence may substantially improve the defense position without automatically eliminating every other piece of evidence the prosecution intends to use.

What a DUI Attorney Should Examine in a New Jersey Blood Case

A lawyer defending a New Jersey DWI or criminal case involving blood evidence should not evaluate the case solely by looking at the final number printed on a laboratory report.

The investigation should include the entire process by which the evidence was obtained, preserved, tested and interpreted.

Was the blood draw legally authorized?

The defense should determine whether police obtained a warrant, received legally valid consent or relied on a recognized exception to the warrant requirement.

The precise circumstances are important. A person being transported to a hospital after an accident does not give law enforcement unrestricted authority to obtain and use medical blood evidence.

Who collected the sample?

The records should identify who drew the blood, when it was collected, what equipment was used and whether the proper procedures were followed.

The timing of the draw may also be important because a person’s alcohol concentration changes as alcohol is absorbed and eliminated.

Was the sample properly preserved?

The defense should examine the collection kit, preservatives, seals, labeling, refrigeration and transportation records.

Missing documentation or unexplained gaps in the chain of custody may raise questions about whether the tested sample can be reliably connected to the defendant and whether its condition remained unchanged.

What did the laboratory actually test?

The laboratory records should establish whether the sample was:

• Whole blood.
• Plasma.
• Serum.
• A hospital diagnostic sample.
• A forensic sample collected specifically for law-enforcement testing.

The distinction may affect how the reported result should be interpreted.

Was a conversion used?

When the reported alcohol concentration was not obtained directly from whole blood, the defense should determine whether a conversion factor was used and whether the prosecution can establish that the conversion was scientifically appropriate for the particular sample and testing procedure.

A small mathematical difference can be extremely important when the reported result is close to 0.08%.

Can the laboratory witnesses explain the result?

The prosecution must do more than place a laboratory report in front of the court. The witnesses and records should be able to explain the testing methodology, instruments, controls, calculations and conclusions.

When experts disagree, the factfinder may be required to decide which interpretation is more reliable.

The Court Later Allowed the Case to Continue

After the New York Post published its article, the court considered the defense request to dismiss or re-present the charges because of the disputed blood-alcohol evidence.

On May 11, 2026, the judge denied the request to dismiss the charges. The court concluded that the competing interpretations of the blood evidence were issues that could be evaluated by a jury with the assistance of expert testimony. The ruling did not necessarily resolve the scientific dispute in the prosecution’s favor; it allowed the case and the evidentiary dispute to proceed.

That ruling illustrates an important principle in DUI and criminal defense: identifying a serious weakness in the State’s evidence does not always produce an immediate dismissal. The issue may instead become the subject of motions, expert testimony, cross-examination and argument at trial.

Why This Case Matters Beyond the Headlines

The Gaudreau case is extraordinary because of the devastating loss of life and the national attention surrounding it. But the evidentiary questions are relevant to many New Jersey cases involving alleged intoxication.

Blood evidence frequently arises when:

• A driver is taken to a hospital after an accident.
• A breath test cannot be administered.
• Police suspect drug impairment.
• The investigation involves serious bodily injury or death.
• Law enforcement obtains a blood-draw warrant.
• Prosecutors seek hospital records containing diagnostic test results.

Whether the case involves a municipal-court DWI or an indictable criminal charge, the reliability and admissibility of the blood evidence can affect the entire prosecution.

No one should assume that a reported BAC number is automatically accurate, admissible or immune from challenge. At the same time, the defense must examine the State’s remaining evidence and prepare for the possibility that prosecutors will attempt to prove impairment without relying exclusively on the chemical result.

New Jersey DUI and Criminal Defense Attorney Anthony Vecchio

Anthony J. Vecchio is a New Jersey DUI and criminal defense attorney with an office in Woodbridge. His practice includes the defense of cases involving:

• Breath and blood-alcohol testing.
• DWI and refusal charges.
• Drug-impaired-driving allegations.
• Motor-vehicle accidents.
• Search warrants and constitutional violations.
• Field-sobriety testing.
• Vehicular assault and death-by-auto investigations.
• Municipal and Superior Court criminal charges.

His experience includes working on both sides of the courtroom as a defense attorney and municipal prosecutor. He personally reviews the evidence in his clients’ cases, including police reports, body-camera footage, laboratory records, warrants and expert materials.

Charged With DWI or a Criminal Offense Involving Blood Evidence?

A blood result should be investigated—not simply accepted.

The appropriate defense depends on the reason for the blood draw, the testing method, the laboratory documentation, the timing of the sample and the other evidence the State intends to present.

Contact the Law Offices of Anthony J. Vecchio to discuss a New Jersey DWI or criminal case involving blood-alcohol or toxicology evidence.