A prosecutor who obtains an incriminating statement from a defendant is obliged to honor a subpoena and to testify at a suppression hearing if there is a reasonable probability that testifying will lead to relevant evidence. State v. Wallis, 149 Wis. 2d 534, 439 N.W.2d 590 (Ct. App. 1989).

A defendant had no confrontation clause rights as to hearsay at a pretrial motion hearing. The trial court could rely on hearsay in making its decision. State v. Frambs, 157 Wis. 2d 700, 460 N.W.2d 811 (Ct. App. 1990).

Allegations of professional misconduct against the prosecution’s psychiatric expert initially referred to the prosecutor’s office but immediately transferred to a special prosecutor for investigation and possible criminal proceedings were properly excluded as the subject of cross-examination of the expert due to the lack of a logical connection between the expert and prosecutor necessary to suggest bias. State v. Lindh, 161 Wis. 2d 324, 468 N.W.2d 168 (1991).

The ability of a child witness to speak the truth or communicate intelligently are matters of credibility for the jury, not questions of competency to be determined by the judge. State v. Hanna, 163 Wis. 2d 193, 471 N.W.2d 238 (Ct. App. 1991).

When a witness’s “past-recollection recorded statement” was admitted after the witness testified and was found “unavailable” as a result of having no current memory of the murder in question, there was an opportunity for cross-examination and the right to confrontation was not violated. State v. Jenkins, 168 Wis. 2d 175, 483 N.W.2d 262 (Ct. App. 1992).

A defendant charged with trespass to a medical facility is entitled to compulsory process to determine if any patients present at the time of the alleged incident had relevant evidence. State v. Migliorino, 170 Wis. 2d 576, 489 N.W.2d 678 (Ct. App. 1992).

An indigent may be entitled to have a court compel the attendance of an expert witness. It may be error to deny a request for an expert to testify on the issue of suggestive interview techniques used with a young child witness if there is a “particularized need” for the expert. State v. Kirschbaum, 195 Wis. 2d 11, 535 N.W.2d 462 (Ct. App. 1995), 94-0899.

In this case, the defendant’s right to confrontation was violated when the trial court failed to give the jury a limiting instruction regarding out-of-court statements made by a nontestifying codefendant. State v. Mayhall, 195 Wis. 2d 53, 535 N.W.2d 473 (Ct. App. 1995), 94-0727. But see Gray v. Maryland, 523 U.S. 185, 118 S. Ct. 1151, 140 L. Ed. 2d 294 (1998); Samia v. United States, 599 U.S. ___, 143 S. Ct. 2004, 216 L. Ed. 2d 597 (2023).

An accused has the right to be present at trial, but the right may be waived by misconduct or consent. A formal on-the-record waiver is favored, but not required. State v. Divanovic, 200 Wis. 2d 210, 546 N.W.2d 501 (Ct. App. 1996), 95-0881.

The right to confrontation is not violated when the court precludes a defendant from presenting evidence that is irrelevant or immaterial. State v. McCall, 202 Wis. 2d 29, 549 N.W.2d 418 (1996), 94-1213.

Evidence of 911 calls, including tapes and transcripts of the calls, is not inadmissible hearsay. Admission does not violate the right to confront witnesses. State v. Ballos, 230 Wis. 2d 495, 602 N.W.2d 117 (Ct. App. 1999), 98-1905.

For a defendant to establish a constitutional right to the admissibility of proffered expert testimony, the defendant must satisfy a two-part inquiry determining whether the evidence is clearly central to the defense and the exclusion of the evidence is arbitrary and disproportionate to the purpose of the rule of exclusion, so that exclusion undermines fundamental elements of the defendant’s defense. Under the first part of the inquiry, a defendant must demonstrate that the proffered testimony satisfies each of the following four requirements: 1) the testimony of the expert witness meets the s. 907.02 standards governing the admission of expert testimony; 2) the expert testimony is clearly relevant to a material issue in the case; 3) the expert testimony is necessary to the defendant’s case; and 4) the probative value of the expert testimony outweighs its prejudicial effect. Under the second part of the inquiry, the court must determine whether the defendant’s right to present the proffered evidence is nonetheless outweighed by the state’s compelling interest to exclude the evidence. State v. St. George, 2002 WI 50, 252 Wis. 2d 499, 643 N.W.2d 777, 00-2830.

Cross-examination of a highly qualified witness, who is familiar with the procedures used in performing the tests whose results are offered as evidence, who supervises or reviews the work of the testing analyst, and who renders the expert’s own expert opinion is sufficient to protect a defendant’s right to confrontation, despite the fact that the expert was not the person who performed the mechanics of the original tests. State v. Williams, 2002 WI 58, 253 Wis. 2d 99, 644 N.W.2d 919, 00-3065.

When the privilege against self-incrimination prevents a defendant from directly questioning a witness about his or her testimony, it may be necessary to prohibit that witness from testifying or to strike portions of the testimony if the witness has already testified. A defendant’s right of confrontation is denied in each instance that potentially relevant evidence is excluded. The question is whether the defendant could effectively cross-examine the witness. State v. Barreau, 2002 WI App 198, 257 Wis. 2d 203, 651 N.W.2d 12, 01-1828.

When a witness’s memory, credibility, or bias was not at issue at trial, the inability of the defendant to cross-examine the witness at the preliminary hearing with questions that went to memory, credibility, or bias did not present an unusual circumstance that undermined the reliability of the witness’s testimony. Admission of the unavailable witness’s preliminary hearing testimony did not violate the defendant’s constitutional right to confrontation. State v. Norman, 2003 WI 72, 262 Wis. 2d 506, 664 N.W.2d 97, 01-3303.

A violation of the confrontation clause does not result in automatic reversal, but rather is subject to harmless error analysis. State v. Weed, 2003 WI 85, 263 Wis. 2d 434, 666 N.W.2d 485, 01-1746.

Prior testimony may be admitted against a criminal defendant only when that defendant has had a prior opportunity to cross-examine the witness giving that testimony. State v. Hale, 2005 WI 7, 277 Wis. 2d 593, 691 N.W.2d 637, 03-0417.

Unavailability for confrontation purposes requires both that the hearsay declarant not appear at the trial and, critically, that the state make a good-faith effort to produce that declarant at trial. If there is a remote possibility that affirmative measures might produce the declarant, the obligation of good faith may demand their effectuation. The lengths to which the prosecution must go to produce a witness is a question of reasonableness. State v. King, 2005 WI App 224, 287 Wis. 2d 756, 706 N.W.2d 181, 04-2694.

Casual remarks on the telephone to an acquaintance plainly were not testimonial. That an informant overheard the remarks does not transform the informant into a government officer or change the casual remark into a formal statement. Statements made in furtherance of a conspiracy by their nature are not testimonial. State v. Savanh, 2005 WI App 245, 287 Wis. 2d 876, 707 N.W.2d 549, 04-2583.

A witness’s claimed inability to remember earlier statements or the events surrounding those statements does not implicate the requirements of the confrontation clause if the witness is present at trial, takes an oath to testify truthfully, and answers the questions put to the witness during cross-examination. In contrast to cases when the witness either invokes the 5th amendment and remains silent or refuses to be sworn in or testify, when a witness takes the stand, agrees to testify truthfully, and answers the questions posed by defense counsel, defense counsel is able to test the witness’s recollection, motive, and interest and hold the witness’s testimony up so that the jury can decide whether it is worthy of belief. State v. Rockette, 2006 WI App 103, 294 Wis. 2d 611, 718 N.W.2d 269, 04-2732.

Despite the state constitution’s more direct guarantee to defendants of the right to meet their accusers face to face, the Wisconsin Supreme Court has generally interpreted the state and federal rights of confrontation to be coextensive. The U.S. Supreme Court’s decision in Crawford, 541 U.S. 36 (2004), does not represent a shift in confrontation-clause jurisprudence that overturns state and federal precedents permitting a witness to testify from behind a barrier upon a particularized showing of necessity. State v. Vogelsberg, 2006 WI App 228, 297 Wis. 2d 519, 724 N.W.2d 649, 05-1293.

The accused does not have an unfettered right to offer testimony that is incompetent, privileged, or otherwise inadmissible under the standard rules of evidence. When evidence is irrelevant or not offered for a proper purpose, the exclusion of that evidence does not violate a defendant’s constitutional right to present a defense. There is no abridgement on the accused’s right to present a defense so long as the rules of evidence used to exclude the evidence offered are not arbitrary or disproportionate to the purposes for which they are designed. State v. Muckerheide, 2007 WI 5, 298 Wis. 2d 553, 725 N.W.2d 930, 05-0081.

The confrontation clause places no constraints on the use of prior testimonial statements when the declarant appears for cross-examination. It made no difference in this case in which oral statements of a witness were not disclosed until a subsequent police witness testified whether the burden was on the state or the defendant to show that the witness was available for further cross-examination after the court told the witness he could step down. The witness testified and was cross-examined concerning his statements to the police; therefore, defendant’s right to confrontation was not violated. State v. Nelis, 2007 WI 58, 300 Wis. 2d 415, 733 N.W.2d 619, 05-1920.

Inasmuch as a criminal defendant does not have an unqualified right to require the appearance of any persons as witnesses for trial, and a defendant’s right to compulsory process at trial must satisfy certain standards, the compulsory process rights of a defendant at the preliminary stage of criminal proceedings also must be subject to reasonable restrictions. The court declines to expand a criminal defendant’s compulsory process rights to encompass a right to subpoena police reports and other non-privileged investigatory materials for examination and copying in anticipation of a preliminary hearing. State v. Schaefer, 2008 WI 25, 308 Wis. 2d 279, 746 N.W.2d 457, 06-1826.