WI · jury_instructions
Wis JI-Criminal 605
Instruction on the Issue of the Defendant's Criminal Responsibility - Mental Disease or Defect
You have just heard testimony about the defendant's mental condition at the time of the
offense. You will now be asked to determine whether the defendant is not responsible by
reason of mental disease or defect. 2
Two Questions
This issue will be presented to you in the form of two questions. 3
1. At the time the crime was committed, did the defendant have a mental disease or
defect?
2. As a result of the mental disease or defect, did the defendant lack substantial
capacity either to appreciate the wrongfulness of the conduct or to conform that
conduct to the requirements of law?
You will be asked to answer the second question only if you answer the first
question "yes."
The Defendant's Burden of Proof
Before you may answer a question "yes," the defendant must satisfy you to a reasonable
certainty by the greater weight of the credible evidence 4 that the answer to that question
should be "yes."
Evidence has greater weight when it has more convincing power than the evidence
opposed to it. Credible evidence is evidence which in the light of reason and common sense
is worthy of belief. 5
The First Question
The first question is: At the time the crime was committed, did the defendant have a
mental disease or defect?
Meaning of "Mental Disease or Defect"
Mental disease or defect is an abnormal condition of the mind which substantially affects
mental or emotional processes. 6
The term "mental disease or defect" identifies a legal standard that may not exactly match
the medical terms used by mental health professionals. You are not bound by medical labels,
definitions, or conclusions as to what is or is not a mental disease or defect to which the
witnesses may have referred. 7
You should not find that a person is suffering from a mental disease or defect merely
because the person committed a criminal act, or because of the unnaturalness or enormity of
the act, or because a motive for the act may be lacking. 8
ADD THE FOLLOWING IF SUPPORTED BY THE EVIDENCE
[Temporary passion or frenzy prompted by revenge, hatred, jealousy, envy, or the like
does not constitute a mental disease or defect.] 9
[An abnormality manifested only by repeated criminal or otherwise antisocial conduct
does not constitute a mental disease or defect.] 10
[A voluntarily induced state of intoxication by drugs or alcohol or both does not
constitute a mental disease or defect.] 11
[A temporary mental state which is brought into existence by the voluntary taking of
drugs or alcohol does not constitute a mental disease or defect.] 12
[Chronic use of drugs or alcohol may produce a condition that can constitute a mental
disease or defect if the condition has become permanent.] 13
Jury Decision on the First Question
If you answer the first question "yes," you must go on to answer the second question. If
you answer the first question "no," you should not consider the second question.
The Second Question
The second question is: As a result of the mental disease or defect, did the defendant
lack substantial capacity either to appreciate the wrongfulness of the conduct or to conform
that conduct to the requirements of law? 14
If You Answer Both Questions "Yes"
If you answer both of these questions "yes," the defendant will be found to be not
responsible for the offense, and will be committed to the Department of Health Services and
will be placed in an appropriate institution unless the court determines that the defendant
would not pose a danger to (himself) (herself) or to others if released under conditions
ordered by the court. 15 In deciding whether the defendant is responsible for the criminal
conduct, you are to consider only the issue of the defendant's mental condition at the time the
offense was committed.
Verdict
Agreement by ten or more jurors is sufficient to become the verdict of the jury. 16 Jurors
have a duty to consult with one another and to deliberate for the purpose of reaching
agreement. At least the same ten jurors should agree in all the answers made. I ask you to be
unanimous if you can.
At the bottom of the verdict, you will find a place provided where dissenting jurors, if
any, will sign their names and state the answer or answers with which they do not agree.
Either the blank lines or the space below them may be used for that purpose.
History
Wis JI-Criminal 605 (2011). Release No. 49, 5/2011. © 2011, 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
59d4cbeb874fc3c3cf1a3e903b7168e10d1a19cb3fbd93efe5100a44aa3da50e
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