WI · jury_instructions
Wis JI-Criminal 1185
Homicide by Operation of Vehicle While Under the Influence
Statutory Definition of the Crime
Section 940.09(1)(a) of the Criminal Code of Wisconsin is violated by one who
causes the death of another by the operation or handling of a vehicle while under the
influence of an intoxicant. 1
State’s Burden of Proof
Before you may find the defendant guilty of this offense, the State must prove by
evidence which satisfies you beyond a reasonable doubt that the following three elements
were present.
Elements of the Crime That the State Must Prove
1. The defendant operated 2 a vehicle. 3
“Operate” means the physical manipulation or activation of any of the
controls of a vehicle necessary to put it in motion. 4
2. The defendant’s operation of a vehicle caused the death of (name of victim).
“Cause” means that the defendant’s operation of a vehicle was a substantial
factor 5 in producing the death.
3. The defendant was under the influence of an intoxicant at the time the defendant
operated a vehicle.
Definition of “Under the Influence of an Intoxicant”
“Under the influence of an intoxicant” means that the defendant’s ability to operate a
vehicle was materially impaired because of consumption of an alcoholic beverage. 6
Not every person who has consumed alcoholic beverages is “under the influence” as
that term is used here. What must be established is that the person has consumed a
sufficient amount of alcohol to cause the person to be less able to exercise the clear
judgment and steady hand necessary to handle and control a motor vehicle.
It is not required that impaired ability to operate be demonstrated by particular acts of
unsafe driving. What is required is that the person’s ability to safely control the vehicle
be materially impaired.
How to Use the Test Result Evidence
The law states that the alcohol concentration in a defendant’s (breath) (blood) (urine)
sample taken within three hours of operating a vehicle is evidence of the defendant’s
alcohol concentration at the time of the operating. 7
WHERE TEST RESULTS SHOWING MORE THAN 0.04 BUT LESS THAN
0.08 GRAMS HAVE BEEN ADMITTED, THE EVIDENCE IS RELEVANT
BUT DOES NOT HAVE PRIMA FACIE EFFECT. SEE WIS
JI-CRIMINAL 232. 8
WHERE TEST RESULTS SHOWING 0.08 GRAMS OR MORE HAVE BEEN
ADMITTED 9 AND THERE IS NO ISSUE RELATING TO THE
DEFENDANT’S POSITION ON THE “BLOOD-ALCOHOL CURVE,” 10 THE
JURY SHOULD BE INSTRUCTED AS FOLLOWS:
[If you are satisfied beyond a reasonable doubt that there was [.08 grams or more of
alcohol in 100 milliliters of the defendant’s blood] [.08 grams or more of alcohol in 210
liters of the defendant’s breath] at the time the test was taken, you may find from that fact
alone that the defendant was under the influence of an intoxicant at the time of the
alleged operating, but you are not required to do so. You the jury are here to decide this
question on the basis of all the evidence in this case, and you should not find that the
defendant was under the influence of an intoxicant at the time of the alleged operating,
unless you are satisfied of that fact beyond a reasonable doubt.]
IF AN APPROVED TESTING DEVICE IS INVOLVED, THE FOLLOWING
MAY BE ADDED: 11
[The law recognizes that the testing device used in this case uses a scientifically
sound method of measuring the alcohol concentration of an individual. The State is not
required to prove the underlying scientific reliability of the method used by the testing
device. However, the State is required to establish that the testing device was in proper
working order and that it was correctly operated by a qualified person.]
IF THERE IS NO EVIDENCE OF THE DEFENSE DEFINED BY SECTION
940.09(2), USE THE FOLLOWING CLOSING: 12
[Jury’s Decision]
[If you are satisfied beyond a reasonable doubt that all three elements of this offense
have been proved, you should find the defendant guilty.
If you are not so satisfied, you must find the defendant not guilty.]
IF THERE IS EVIDENCE OF THE DEFENSE DEFINED BY SECTION
940.09(2), 13 USE THE FOLLOWING:
[Consider Whether the Defense is Proved]
[Wisconsin law provides that it is a defense to this crime if the death would have
occurred even if the defendant had been exercising due care and had not been under the
influence of an intoxicant.
The burden is on the defendant to prove by evidence which satisfies you to a
reasonable certainty by the greater weight of the credible evidence 14 that this defense is
established.
“By the greater weight of the evidence” is meant evidence which, when weighed
against that opposed to it, has more convincing power. “Credible evidence” is evidence
which in the light of reason and common sense is worthy of belief.]
ADD THE FOLLOWING IF REQUESTED AND IF EVIDENCE OF THE
CONDUCT OF THE VICTIM HAS BEEN INTRODUCED AS RELEVANT
TO THE AFFIRMATIVE DEFENSE. DO NOT GIVE WITHOUT CLEAR
JUSTIFICATION. 15
[Evidence has been received relating to the conduct of (name of victim) at the time of
the alleged crime. Any failure by (name of victim) to exercise due care 16 does not by
itself provide a defense to the crime charged against the defendant. 17 Consider evidence
of the conduct of (name of victim) in deciding whether the defendant has established that
the death would have occurred even if the defendant had not been under the influence of
an intoxicant and had been exercising due care.]
Jury’s Decision
[If you are satisfied to a reasonable certainty by the greater weight of the credible
evidence that this defense is proved, you must find the defendant not guilty.
If you are not satisfied to a reasonable certainty by the greater weight of the credible
evidence that this defense is proved and you are satisfied beyond a reasonable doubt that
all elements of this offense have been proved, you should find the defendant guilty.
If you are not satisfied beyond a reasonable doubt that all elements of this offense
have been proved, you must find the defendant not guilty. 18]
History
Wis JI-Criminal 1185 (2020). Release No. 58, 7/2020. © 2020, Regents, Univ. of Wis. Prepared by the Wisconsin Criminal Jury Instructions Committee of the Wisconsin Judicial Conference with the University of Wisconsin Law School; posted by the Wisconsin State Law Library with the University's permission.
Provenance
- Source
- wilawlibrary.gov
- Retrieved
- 2026-09-24
- Edition
- 2026-09-24
- Content hash
3fa0a6eb5d3f06a28140ed8f138344c15468406c5725f8edf4f4670f28aefa76
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