971.23(3) (3) Comment or instruction on failure to call witness. No comment or instruction regarding the failure to call a witness at the trial shall be made or given if the sole basis for such comment or instruction is the fact the name of the witness appears upon a list furnished pursuant to this section.

971.23(5) (5) Scientific testing. On motion of a party subject to s. 971.31 (5), the court may order the production of any item of physical evidence which is intended to be introduced at the trial for scientific analysis under such terms and conditions as the court prescribes.

971.23(6) (6) Protective order. Upon motion of a party, the court may at any time order that discovery, inspection or the listing of witnesses required under this section be denied, restricted or deferred, or make other appropriate orders. If the district attorney or defense counsel certifies that to list a witness may subject the witness or others to physical or economic harm or coercion, the court may order that the deposition of the witness be taken pursuant to s. 967.04 (2) to (6). The name of the witness need not be divulged prior to the taking of such deposition. If the witness becomes unavailable or changes his or her testimony, the deposition shall be admissible at trial as substantive evidence.

971.23(6m) (6m) In camera proceedings. Either party may move for an in camera inspection by the court of any document required to be disclosed under sub. (1) or (2m) for the purpose of masking or deleting any material which is not relevant to the case being tried. The court shall mask or delete any irrelevant material.

971.23(7) (7) Continuing duty to disclose. If, subsequent to compliance with a requirement of this section, and prior to or during trial, a party discovers additional material or the names of additional witnesses requested which are subject to discovery, inspection or production under this section, the party shall promptly notify the other party of the existence of the additional material or names.

971.23(7m)(a)(a) The court shall exclude any witness not listed or evidence not presented for inspection or copying required by this section, unless good cause is shown for failure to comply. The court may in appropriate cases grant the opposing party a recess or a continuance.

971.23(7m)(b) (b) In addition to or in lieu of any sanction specified in par. (a), a court may, subject to sub. (3), advise the jury of any failure or refusal to disclose material or information required to be disclosed under sub. (1) or (2m), or of any untimely disclosure of material or information required to be disclosed under sub. (1) or (2m).

971.23(8)(a)(a) If the defendant intends to rely upon an alibi as a defense, the defendant shall give notice to the district attorney at the arraignment or at least 15 days before trial stating particularly the place where the defendant claims to have been when the crime is alleged to have been committed together with the names and addresses of witnesses to the alibi, if known. If at the close of the state's case the defendant withdraws the alibi or if at the close of the defendant's case the defendant does not call some or any of the alibi witnesses, the state shall not comment on the defendant's withdrawal or on the failure to call some or any of the alibi witnesses. The state shall not call any alibi witnesses not called by the defendant for the purpose of impeaching the defendant's credibility with regard to the alibi notice. Nothing in this section may prohibit the state from calling said alibi witnesses for any other purpose.

971.23(8)(b) (b) In default of such notice, no evidence of the alibi shall be received unless the court, for cause, orders otherwise.

971.23(8)(c) (c) The court may enlarge the time for filing a notice of alibi as provided in par. (a) for cause.

971.23(8)(d) (d) Within 10 days after receipt of the notice of alibi, or such other time as the court orders, the district attorney shall furnish the defendant notice in writing of the names and addresses, if known, of any witnesses whom the state proposes to offer in rebuttal to discredit the defendant's alibi. In default of such notice, no rebuttal evidence on the alibi issue shall be received unless the court, for cause, orders otherwise.

971.23(8)(e) (e) A witness list required under par. (a) or (d) shall be provided in addition to a witness list required under sub. (1) (d) or (2m) (a), and a witness disclosed on a list under sub. (1) (d) or (2m) (a) shall be included on a list under par. (a) or (d) if the witness is required to be disclosed under par. (a) or (d).

971.23(9)(a)(a) In this subsection "deoxyribonucleic acid profile" has the meaning given in s. 939.74 (2d) (a).

971.23(9)(b) (b) Notwithstanding sub. (1) (e) or (2m) (am), if either party intends to submit deoxyribonucleic acid profile evidence at a trial to prove or disprove the identity of a person, the party seeking to introduce the evidence shall notify the other party of the intent to introduce the evidence in writing by mail at least 45 days before the date set for trial; and shall provide the other party, within 15 days of request, the material identified under sub. (1) (e), or par. (2m) (am), whichever is appropriate, that relates to the evidence.

971.23(9)(c) (c) The court shall exclude deoxyribonucleic acid profile evidence at trial, if the notice and production deadlines under par. (b) are not met, except the court may waive the 45 day notice requirement or may extend the 15 day production requirement upon stipulation of the parties, or for good cause, if the court finds that no party will be prejudiced by the waiver or extension. The court may in appropriate cases grant the opposing party a recess or continuance.

971.23(10) (10) Payment of photocopy costs in cases involving indigent defendants. When the state public defender or a private attorney appointed under s. 977.08 requests photocopies of any item that is discoverable under this section, the state public defender shall pay any fee charged for the photocopies from the appropriation under s. 20.550 (1) (f). If the person providing photocopies under this section charges the state public defender a fee for the photocopies, the fee may not exceed the actual, necessary and direct cost of photocopying.

971.23 Annotation Inadequate preparation for trial that results in a district attorney's failure to disclose all scientific reports does not constitute good cause for the failure if the defense is misled, but this is subject to the harmless error rule. Wold v. State, 57 Wis. 2d 344, 204 N.W.2d 482 (1973).

971.23 Annotation When a prosecutor submitted a list of 97 witnesses he intended to call, the court should have required him to be more specific as to those he really intended to call. Irby v. State, 60 Wis. 2d 311, 210 N.W.2d 755 (1973).

971.23 Annotation When a party successfully moves to have material masked or deleted from a discovery document, the proper procedure to be pursued is to place it in a sealed envelope or container, if necessary, so that it may be preserved for appellate review. State v. Van Ark, 62 Wis. 2d 155, 215 N.W.2d 41 (1974).

971.23 Annotation Under both the provisions of this section and the constitutional duty of the state to disclose to a criminal defendant evidence that is exculpatory in nature, there is no requirement to provide exculpatory evidence that is not within the exclusive possession of the state and does not surprise or prejudice the defendant. State v. Calhoun, 67 Wis. 2d 204, 226 N.W.2d 504 (1975).

971.23 Annotation Although substantial evidence indicates that the state had subpoenaed its "rebuttal" witness at least 2 weeks before he was called to testify and deliberately held him back for "dramatic" effect, no objection or motion to suppress was made on the proper ground that the witness was not a bona fide rebuttal witness hence objection to the witness' testimony was waived. Caccitolo v. State, 69 Wis. 2d 102, 230 N.W.2d 139 (1975).

971.23 Annotation The prosecutor's duty to disclose does not ordinarily extend to discovery of criminal records from other jurisdictions. The prosecutor must make good faith efforts to obtain records from other jurisdictions specifically requested by the defense. Jones v. State, 69 Wis. 2d 337, 230 N.W.2d 677 (1975).

971.23 Annotation Police officers' "memo books" and reports were within the rule requiring production of witness statements, since the books and reports were written by the officers, the reports signed by them, and both officers testified as to the incident preceding defendant's arrest. State v. Groh, 69 Wis. 2d 481, 230 N.W.2d 745 (1975).