CALLOW, WILLIAM G., J.
This case is before this court on certification from the court of appeals pursuant to sec. (Rule) 809.61., Stats. The defendant-appellant Lionel D. Walker (Walker) appeals from a judgment of conviction and an order denying his motion for post-conviction relief of the circuit court for Kenosha county, Judge Jerold W. Breitenbach.
Walker, who is black, raises three issues on appeal. First, Walker contends that he was denied his federal and state constitutional right to effective assistance of counsel because his counsel did not object when the prosecutor used a peremptory challenge to exclude the only black person from the petit jury. Second, Walker claims he was denied his federal and state constitutional right to effective assistance of counsel when his counsel failed to move to suppress lineup and in-court identifications as the forbidden fruits of an allegedly unlawful arrest. Third, Walker argues that the circuit court erred in refusing to admit evidence concerning a crime that occurred when he was incarcerated and that he claims was similar to those for which he was on trial.
We first conclude that Walker has established, prima facie, that the prosecutor used a peremptory challenge in a racially discriminatory manner during the jury selection process at his trial, that the prosecutor's explanation for the challenge was not sufficient to rebut the prima facie case, and that, as a result, Walker's convic[162]*162tion must be reversed and he is entitled to a new trial. We further conclude that Walker's arrest was unlawful and that, on remand, the circuit court must determine whether the lineup identification evidence must be suppressed as the fruit of the unlawful arrest. If the circuit court determines that the lineup evidence should be suppressed as the fruit of the unlawful arrest, then the court must determine whether any in-court identification must be suppressed. We finally conclude that the circuit court did not err in excluding evidence concerning a crime that occurred while Walker was incarcerated.
We begin by setting forth the facts relevant to the issues raised by Walker. Between August 27, 1986 and September 1, 1986, armed robberies, which were executed in similar fashion, occurred in four city of Keno-sha taverns: Jesse's Bar, V.J.'s Lounge, Friar Pub Tavern, and the Kenosha Tap. In all four cases, a black man entered the tavern, ordered Old Style beer, and then, speaking quietly, told the bartender to give him the money from the cash register. In each case, the mem held his right arm inside his outer garment to create the appearance that he had a gun and departed immediately after receiving the money. All four robberies occurred in either the late evening or early morning hours, prior to the tavern’s closing.
On September 4, 1986, at approximately 9:15 p.m., Walker was arrested in the fenced-in backyard of his home.1 The arrest was made without a warrant. The next morning Walker, who was a suspect in the four above-mentioned armed robberies, was placed in a lineup [163]*163consisting of six black males.2 The eyewitness to the robbery at Jesse's Bar positively identified Walker. The eyewitness to the robbery at V.J.'s Lounge made a tentative identification of Walker, as did the eyewitness to the Friar Pub Tavern robbery. Two eyewitnesses to the Kenosha Tap robbery viewed the lineup. One eyewitness was unable to identify anyone, while the other positively identified Walker.
On September 25, 1986, a criminal complaint was filed, charging Walker with four counts of armed robbery. Prior to trial, Walker's counsel filed two motions that are relevant to the arguments Walker raises on appeal. First, on September 30, 1986, Walker's counsel filed a motion to dismiss the action on the ground that the court lacked jurisdiction because Walker was brought before the court pursuant to an illegal arrest. The circuit court denied the motion to dismiss, citing State v. Smith, 131 Wis. 2d 220, 388 N.W.2d 601 (1986), in which this court held that an illegal arrest would no longer deprive the court of personal jurisdiction over the defendant. Second, on November 7, 1986, Walker's counsel filed a motion to suppress evidence with respect to lineup, photographic, and in-court identifications of Walker on the ground that any such identification would violate multiple federal and state constitutional rights. Walker's counsel orally withdrew this motion at a December 5,1986 hearing, explaining, in part, as follows:
I have realized that since I made the motion, that Mr. Walker was represented by an attorney from the Public Defender's Office ... at the line-up, and . . . no objections as to police procedures . . . were made by her at that time .... I don't . . . have any inde[164]*164pendent evidence at this time to support my burden . . . [with respect to] that motion .... If there would be any information between now and then gathered until the time of trial, I would renew it, but at this time I am not aware of any.
The jury was selected for Walker's trial on December 15,1986. Of the twenty venirepersons, one was black. During the voir dire examination of potential jurors, the black venireperson did not answer in a way that would suggest a disqualifying attitude to any general questions directed at the pool of jurors by the judge or by the lawyers, nor did the court or counsel ask the black venireperson any specific questions. Because only twelve people ultimately would serve as jurors at Walker's trial, the prosecutor and defense counsel each were allowed to use peremptory challenges to eliminate four venireper-sons from the pool of twenty. With the third of his four peremptory challenges, the prosecutor eliminated the black venireperson. Defense counsel did not object.
Walker's three-day jury trial on the four counts of armed robbery commenced on December 15, 1986. During its case-in-chief, the prosecution introduced lineup evidence from all five eyewitnesses, and each eyewitness made an in-court identification of Walker as the perpetrator of the crime that each had observed. In addition, evidence that two eyewitnesses had identified Walker at Walker's, preliminary examination was also introduced by the prosecution.
The theory of defense was that the four armed robberies in question had been committed by someone else, Walker having been misidentified as the perpetrator. In an effort to prove that theory, Walker introduced evidence about two armed robberies that occurred while he was incarcerated pending his trial for the four armed robberies in question. These two armed robberies were [165]*165similar to the four for which Walker was standing trial. However, the circuit court prevented Walker from introducing evidence about an armed robbery that was also similar in some respects to the crimes for which Walker had been charged and that also occurred when Walker was incarcerated. According to Walker's offer of proof, which consisted of the police reports concerning that armed robbery, the perpetrator was a black male with light skin tone and liver spots on his face. The trial judge excluded evidence about this crime because no eyewitnesses to the crimes for which Walker had been charged had described the perpetrator as having light skin tone and liver spots.
At the conclusion of the trial, the jury found Walker guilty of all four counts of armed robbery in violation of sec. 943.32(1)(b)(2), Stats. On January 28, 1987, the circuit court sentenced Walker to ninety-nine years imprisonment, as a repeater.
On July 11, 1988, Walker filed a post-conviction motion, alleging that he was denied his state and federal constitutional right to effective assistance of counsel. Walker asserted that his trial counsel was ineffective in two respects. First, Walker claimed that trial counsel was ineffective because he failed to make a Batson3 objection when the prosecutor used a peremptory challenge to remove the only black person from the venire. Second, Walker alleged trial counsel was ineffective because he did not attempt to suppress lineup and in-court identification evidence as the fruit of his allegedly unlawful arrest.
A hearing was held on the post-conviction motion on September 29, 1988, at which Walker's trial counsel testified. With respect to his failure to make a Batson [166]*166objection, trial counsel testified that prior to trial Walker had expressed reservations about being tried by an all-white jury and that Walker wanted blacks on the jury. Trial counsel testified that he would not have used a peremptory challenge to strike the only black person from the venire. According to trial counsel, at the time of trial, he was unaware of the relatively recent Batson decision, which placed limitations on the prosecution's ability to eliminate venirepersons of defendant's race with peremptory challenges. Trial counsel stated that he should have known about the Batson decision. He would have made a proper objection when the prosecutor used a peremptory challenge to eliminate the only black venireperson, trial counsel testified, had he known about the Batson decision. Walker, himself, apparently had knowledge of the Batson decision. Trial counsel testified that Walker informed him that the prosecutor's use of a peremptory challenge to exclude from the petit jury the only black venireperson may have been unlawful in light of a newspaper article Walker had read about the Batson decision.
With respect to his failure to attempt to suppress the lineup and the in-court identification evidence, trial counsel testified that he knew at trial that Walker was arrested in the backyard of his home without a warrant. Trial counsel further testified that he knew that it was unlawful to make an arrest at a suspect's home without a warrant, but that he never thought to challenge the identifications as the fruit of an unlawful arrest. Trial counsel made it clear that he would have preferred to have the identification evidence excluded.
The prosecutor also appeared at this hearing. With respect to the Batson issue, the prosecutor stated that he had no memory of any venireperson being black and that, in any event, he had no discriminatory intent. The [167]*167prosecutor asserted that a review of his notes from the jury selection process showed a possible explanation for his use of a peremptory challenge on the sole black venireperson: he simply had no information about him. With respect to the failure of Walker's trial counsel to attempt to suppress the identifications of Walker by the witnesses, the prosecutor asserted that trial counsel made a strategic decision not to pursue such a motion and that therefore it was unnecessary to consider the validity of Walker's arrest.
The circuit court denied Walker's motion for post-conviction relief in its Decision and Order filed on October 14,1988. In the Decision and Order, the circuit court first addressed Walker's claim that he was denied his constitutional right to effective assistance of counsel because trial counsel failed to make a Batson objection during the jury selection process. The circuit court found that, although trial counsel erred in not lodging a Batson objection, the error did not constitute deficient performance. The circuit court also found that, had the Batson objection been made, the objection would not have succeeded because there was no evidence that purposeful discrimination tainted the jury selection process. According to the circuit court, Walker had failed to make out a prima facie case of purposeful discrimination. The circuit court noted that the prosecutor was unable to remember that one of the venirepersons was black. The circuit court ruled that the fact that Walker was tried by an all-white jury did not deprive him of a fair trial and that the result of the trial is reliable.
The circuit court then turned to a discussion of whether Walker was denied his right to effective assistance of counsel because trial counsel failed to attempt to suppress the lineup and in-court identifications as the fruits of an unlawful arrest. The circuit court ruled that [168]*168Walker was not denied his right to effective assistance of counsel in this regard. The circuit court found that trial counsel made a strategic decision not to move to suppress the lineup identifications, noting that trial counsel skillfully attempted to impeach the trial testimony of those witnesses who made less than positive identifications at the lineup. Moreover, the circuit court ruled that a motion to suppress the identifications would not have succeeded because the warrantless arrest was not unlawful. In concluding that the arrest was lawful, the circuit court reasoned as follows:
The defendant was arrested in yard [sic] outside of his home that was in plain view of police officers as they arrived. The "plain view" exception to the warrant requirement justified his seizure. The officers arriving at the home went there with extremely strong probable cause to believe that the defendant committed a felony; the defendant was in plain view; the discovery was inadvertent for these purposes, in that they had no way of knowing that he was going to be outside the home when they arrived; and if the defendant would not have come out of the house voluntarily, they could have surrounded the home and obtained a search or arrest warrant since they would have had probable cause for both. The court relies upon the cases of Conrad v. State, 63 Wis. 2d 616 (1974) and Bies v. State, 76 Wis. 2d 457 (1977).
This case is presently before this court on certification from the court of appeals pursuant to sec. (Rule) 809.61, Stats., and this court decided to consider all three issues raised on appeal.
Walker's first contention is that he was denied his state and federal constitutional right to effective assis[169]*169tance of counsel when the prosecutor used a peremptory challenge to exclude the only black venireperson from the petit jury without a Batson objection by his trial counsel.
In the alternative to the ineffective assistance of counsel claim, Walker, relying upon this court's decision in State v. Cleveland, 118 Wis. 2d 615, 348 N.W.2d 512 (1984), urges this court to address the validity of the prosecutor's peremptory challenge as though Walker's trial counsel had made the proper objection during the jury selection process. In Cleveland, it was argued by the State that the defendant had waived his right to present his fourth amendment claim by failing to bring the proper pretrial motion and by failing to make the proper objection at trial. The defendant, on the other hand, claimed that he was denied his constitutional right to effective assistance of counsel since his trial counsel's failure to bring the proper pretrial motion and to object at trial was due to trial counsel's inadequate knowledge of the relevant law. This court noted that, " [although objections which have been waived are not reviewable as a matter of right, this court may consider such objections if it chooses." Id. at 632. This court chose to address the fourth amendment claim on the merits even though trial counsel failed to preserve the claim. Because the defendant's claim was resolved in this fashion, this court did not reach the question of ineffective counsel. Id. at 632-33.
In this case, it is undisputed that Walker's trial counsel was not aware of the Supreme Court's landmark decision in Batson. It is also undisputed that at some point in the proceedings Walker told trial counsel that he thought that the prosecutor's peremptory challenge on the black venireperson was illegal based on a newspaper article he had read about the Batson decision, yet [170]*170counsel did not object. In its decision and order regarding Walker's post-conviction motion the circuit court found that Walker's trial counsel committed error by failing to bring to the court's attention Walker's concern over the striking of the black venireperson. Given these circumstances, we have decided, at our discretion, to undertake an analysis of Walker's Batson claim pursuant to Cleveland and therefore analyze the claim as though a timely objection had been made. Because we treat the Batson claim under the Cleveland approach, we do not reach the question of ineffective assistance of counsel.
Walker argues that he was denied his constitutional right to equal protection of law4 when the prosecutor used a peremptory challenge to exclude the only black venireperson from the petit jury, relying on the decision of the United States Supreme Court in Batson v. Kentucky, 476 U.S. 79 (1986). Our analysis of Walker's claim thus begins with the Batson decision, itself.
In Batson, the defendant, a black man, was charged with second-degree burglary and receipt of stolen goods. During the jury selection process at the defendant's trial, the prosecutor used peremptory challenges to exclude from the petit jury the only four black persons on the venire, leaving an all-white jury. In the United States Supreme Court, the defendant argued that the prosecutor's removal of every potential black juror violated his rights under the sixth and fourteenth amendments to a jury drawn from a cross section of the community and to an impartial jury. The Court decided that proper resolution of the defendant's challenge depended upon equal protection principles, as was argued by the state of Kentucky; therefore, the Court did not address the defen[171]*171dant's sixth amendment argument. Batson, 476 U.S. at 82-83 & n.1.
The Court initially noted that in Swain v. Alabama, 380 U.S. 202 (1965), it recognized that the Equal Protection Clause is violated when the state intentionally excludes blacks from the petit jury on the basis of race. Batson, 476 U.S. at 84. The Court then noted that racial discrimination in the jury selection process harms three distinct groups. First, defendants are harmed when racial discrimination infects the jury selection process. Second, the rights of the excluded jurors are violated when they are denied the opportunity to serve as jurors on account of race. Id. at 86-87. Third, society is harmed by discriminatory jury selection procedures because such discriminatory procedures undermine public confidence in the fairness of our system of justice. Id. at 87.
Under Swain, in order for a black defendant to make out a prima facie showing that the state had used peremptory challenges in contravention of equal protection principles, the defendant was required to show that a prosecutor used such challenges in a racially discriminatory manner "in case after case . . . with the result that no Negroes ever serve on petit juries." Swain, 380 U.S. at 223. Thus, black defendants could not rely solely upon the facts of their particular cases alone to make out a prima facie showing that prosecutors had used peremptory challenges in violation of the Equal Protection Clause.
The Court in Batson noted that the Swain eviden-tiary burden for making out a prima facie case had "placed on defendants a crippling burden of proof, [in effect immunizing] prosecutors' peremptory challenges . . . from constitutional scrutiny." Batson, 476 U.S. at 91-92. The Court rejected the Swain evidentiary burden for making out a prima facie equal protection violation, [172]*172finding it inconsistent with the body of equal protection case law that had developed since the Swain decision. Id. at 93. The Court held that the equal protection cases decided since Swain provided support for the proposition that a defendant could establish a prima facie showing that the prosecutor had used peremptory challenges in a purposefully discriminatory manner by relying solely upon the facts of his or her case. Id. at 96.
After rejecting this portion of the Swain decision, the Court set forth what is required of a defendant in order to establish a prima facie case of purposeful discrimination with respect to the prosecutor's use of peremptory challenges:
[T]he defendant first must show that he is a member of a cognizable racial group and that the prosecutor has exercised peremptory challenges to remove from the venire members of the defendant's race. Second, the defendant is entitled to rely on the fact, as to which there can be no dispute, that peremptory challenges constitute a jury selection practice that permits "those to discriminate who are of a mind to discriminate." Finally, the defendant must show that these facts and any other relevant circumstances raise an inference that the prosecutor used that practice to exclude the veniremen from the petit jury on account of their race. This combination of factors in the empaneling of the petit jury, as in the selection of the venire, raises the necessary inference of purposeful discrimination.
Id. (quoting Avery v. Georgia, 345 U.S. 559, 562 (1953)) (citations omitted). With respect to the third element of the prima facie case, the Court provided two examples of "relevant circumstances" a trial court should consider. First, the Court noted that a "pattern" of strikes against venirepersons of the same race as the defendant might [173]*173raise an inference of discrimination.5 Second, the Court stated that the prosecutor's questions and statements during voir dire might support an inference of discriminatory intent. Id. at 97.
The Court did not further elaborate upon what it meant by "all relevant circumstances." Id. at 96-97. However, other courts have considered the relevant circumstances trial judges should consider in assessing whether the defendant has established a prima facie case, finding the following factors significant:6 whether the prosecution has eliminated all members of the defen[174]*174dant's race from the panel of prospective jurors;7 whether the race of the defendant or his or her witnesses is different than the race of the victim or the state's witnesses;8 whether the excluded jurors sharing the defendant's race responded to any questions of the judge or the lawyers in a manner that made them suitable candidates for exclusion by the prosecutor;9 how many [175]*175venirepersons share defendant's race; and the nature of the crime.10
According to Batson, if the trial judge finds that the defendant has established a prima facie case, "the burden shifts to the State to come forward with a neutral explanation for challenging black jurors." Batson, 476 U.S. at 97. Although the Court recognized that this explanation "requirement imposes a limitation in some cases on the full peremptory character of the historic challenge," the Court emphasized "that the prosecutor's explanation need not rise to the level justifying exercise of a challenge for cause." Id. The prima facie case is not rebutted, the Court noted, when the prosecutor states that venirepersons were challenged on the ground that they would favor the defendant because they were of the same race as the defendant. Id.
The Court in Batson also stated that the prosecutor's explanation must be clear and reasonably specific. Id. at 98 n.20. This requirement that the explanation be clear and reasonably specific is not satisfied by the prosecutor's mere denial of intent to discriminate or the prosecutor's mere affirmance of a good faith intent. Id. at 98. See also Chalan, 812 F.2d at 1314 (Concluding that the following explanation did not satisfy the "clear and reasonably specific" requirement: "based upon his background and other things in his questionnaire, I just elected to strike him.").
In addition to being neutral and clear and reasonably specific, the explanation must be "related to the particular case to be tried." Batson, 476 U.S. at 98. The New Jersey Supreme Court determined that the prosecutor's explanation was unrelated to the case to be tried in State v. Gilmore, 103 N.J. 508, 511 A.2d 1150 (1986), [176]*176where the issue was whether a prosecutor's use of peremptory challenges violated the New Jersey Constitution. The court concluded that one of the prosecutor's explanations for striking blacks — that he wanted jurors of "high intellectual achievement" — was unrelated to the case to be tried because the case involved only the simple issue of whether the defendant could be identified as the perpetrator. Id. at 1168.
Once the defendant has established a prima facie case and the prosecutor has come forward with an explanation that is neutral, clear and reasonably specific, and related to the case to be tried,11 the trial court must determine whether the defendant has established purposeful discrimination. Batson, 476 U.S. at 98. The defendant has the ultimate burden of persuasion with respect to the issue of purposeful discrimination. Id. at 94 n.18.12
[177]*177We now apply these principles to the circuit court's decision in the case at hand. The circuit court concluded that Walker had failed to establish a prima facie case. In reaching this conclusion, the circuit court found the following factors significant: no pattern of strikes against potential jurors of Walker's race had been shown because the prosecutor challenged only one such juror; the prosecutor was not known by the trial judge for customarily eliminating blacks from the jury panel with peremptory challenges; and the prosecutor's questions during voir dire did not support an inference of discriminatory purpose.
We conclude that the circuit court erred in determining that Walker failed to establish a prima facie case.13 Our review of the record shows that Walker is black, that only one of the venirepersons at Walker's trial was black, that the prosecutor used a peremptory challenge to exclude this sole black venireperson from the petit jury,, and that Walker's counsel would not have used a peremptory challenge to strike this venireperson. The circuit court noted that blacks account for less than three percent of the population of Kenosha county and that the prosecutor in this case is not known for customarily striking blacks from the venire. The record also shows that this black venireperson did not answer in a way that would suggest a disqualifying attitude to any general questions directed at the pool of jurors by the [178]*178judge or by the lawyers, nor did the court or counsel ask the black venireperson any specific questions. The record further indicates that every prosecution witness was white while all alibi witnesses for the defense were black. Finally, the prosecutor admitted that he struck the black venireperson because he knew nothing about him. These facts raise an inference of purposeful discrimination.
Because we conclude that Walker has made a prima facie showing of purposeful discrimination, the burden shifts to the prosecution to explain its actions. In its decision regarding Walker's post-conviction motion, the circuit court did not mention the prosecutor's explanations, apparently because the circuit court found that Walker failed to make out a prima facie case. Our review of the record shows that the prosecutor provided two explanations for using a peremptory challenge to strike the sole black venireperson. First, the prosecutor denied that he had a discriminatory motive. The Court in Bat-son declared that the mere denial of discriminatory intent is not sufficient to rebut an inference of purposeful discrimination. Batson, 476 U.S. at 98. Second, the prosecutor explained that, going into the jury selection process for Walker's trial, he only had information about jurors with juror numbers between 841 and 906. The black venireperson had a juror number of 944. The prosecutor thus stated that he struck the black venireperson because he had no information about him. This explanation is unacceptable because it is not "clear and reasonably specific." Moreover, this explanation appears to be pretextual. Of the prosecutor's four peremptory challenges, only one other was used to strike a potential juror with a juror number greater than 906, and seven potential jurors with numbers higher than 906 ultimately served on the jury.
[179]*179We conclude that the circumstances surrounding the jury selection process at Walker's trial support an inference of purposeful discrimination and that the prosecutor did not adequately explain the racial exclusion. Because the record in this case shows an unrebutted prima facie case of purposeful discrimination, Walker's conviction must be reversed. Batson, Id. at 100.
HH HH
Walker's second contention is that he was denied his constitutional right to effective assistance of counsel because his trial counsel failed to move to suppress both lineup and in-court identifications of Walker as the fruit of an unlawful arrest. Because we have already decided that Walker is entitled to a new trial, it is unnecessary to determine whether Walker's trial counsel was ineffective for failing to make such a motion. Rather, we need to decide only whether Walker's arrest was unlawful, and, if so, whether the identification evidence is the fruit of the unlawful arrest.
The first question we address is whether Walker’s arrest was unlawful. The only significant references in the record to Walker's arrest are found in the transcript of the hearing held on Walker's motion for post-conviction relief. At this hearing, Walker provided the following testimony on direct examination regarding the circumstances surrounding his arrest:
Q. Mr. Walker, do you recall when you were originally arrested in this case?
A. Yes, I do.
Q. When was that?
A. It was September 4, 1986.
[180]*180Q. Do you recall where you were at the time of the arrest?
A. I was at my home, my backyard.
Q. Is there a fence around your backyard?
A. Yes, there is.
Q. I'm sorry. Did you say what time it was that you were arrested?
A. It was approximately 9:15. Between 9:15, I think — between 9:00 and 9:30 in the p.m.
Q. p.m.
A. p.m., exactly.
Q. Did any of the arresting officers ever show you a warrant?
A. No.
On cross-examination, Walker further testified about his arrest as follows:
Q. Mr. Walker, relative to your arrest for a moment, you were told the reasons why you were arrested, weren't you?
A. No, I was not. •
Q. You were just taken into custody—
A. Yes.
Q. —by the police on September 4th?
A. On September 4th, right.
Q. Do you remember what time on September 4th?
A. Approximately 9:00, 9:30 p.m.
Q. p.m. or a.m.?
A. p.m.
Q. So it was dark out?
[181]*181Yes, it was. >
You recall what you were doing in the backyard? «©
I was bedding my dog down. >
Okay. You were not in the house itself? p
No, I wasn't. >
Okay. You were arrested by police officers in uniform? p
I was arrested by plainclothed detectives and police officers in uniform. >
Q. You were never told of any reasons why you were arrested then?
[DEFENSE COUNSEL]: Objection, asked and answered.
THE COURT: It has been . . .. My question, sir, is how did they get there. Did they come through an alley or around the side of the house? How'd they get there.
THE WITNESS: They came from — They came in through up in the driveway into the backyard into the house. There were police at the door, the front door of the house, from what I understand, and there were police on the side of the house pointing at the window. Obviously, they thought I was in the house.
THE COURT: I see.
THE WITNESS: And I was in the backyard on the side of the garage with my dog, bedding my dog down for the evening. I had been jogging and I just came back from jogging. I bedded my dog down, when I heard — I heard a noise and I turned and the police — plainclothed detective was standing there, [182]*182and he said, "Don't move, brother, or I'll blow your head off." That's when I was arrested.
THE COURT: And you were still in the backyard?
THE WITNESS: I was in the backyard.
THE COURT: Where did the officer come from?
THE WITNESS: From the driveway.
THE COURT: I see. All right.
The District Attorney offered no evidence at this hearing concerning Walker's arrest. The record thus shows that, at the time of Walker's warrantless nighttime arrest, Walker was in the fenced-in backyard of his home.
In deciding whether Walker's arrest was lawful, we begin by examining the nature of the protection that the fourth amendment provides to the home and the land next to the home.14 In Payton v. New York, 445 U.S. 573 (1980), the United States Supreme Court held that the fourth amendment, made applicable to the states by the fourteenth amendment, prohibits police from making a warrantless and nonconsensual entry into a felony suspect's home to arrest the suspect, absent probable cause and exigent circumstances. The Court has also determined that the fourth amendment protections that attach to the home likewise attach to the curtilage, which is defined generally as "the land immediately surrounding and associated with the home." Oliver v. United States, 466 U.S. 170, 180 (1984). In Oliver, the Court reasoned that the curtilage receives the fourth amendment protections that attach to the home because, [183]*183"[a]t common law, the curtilage is the area to which extends the intimate activity associated with the 'sanctity of a man's home and the privacies of life.' " Id. (quoting Boyd v. United States, 116 U.S. 616, 630 (1886)).
Read together, Payton and Oliver require that police obtain a warrant before entering either the home or its curtilage to make an arrest absent probable cause and exigent circumstances. Under Payton and Oliver, therefore, absent probable cause and exigent circumstances, Walker's warrantless arrest, although not occurring in his home, was unlawful if his fenced-in backyard falls within the curtilage of his home.
In Oliver, the Court stated that the reach of a home's curtilage was in general determined "by reference to the factors that determine whether an individual reasonably may expect that an area immediately adjacent to the home will remain private." Oliver, 466 U.S. at 180.15 The Court explicitly stated the factors relevant to defining the extent of a particular home's curtilage in United States v. Dunn, 480 U.S. 294, 301 (1987):
the proximity of the area claimed to be curtilage to the home, whether the area is included within an enclosure surrounding the home, the nature of uses to which the area is put, and the steps taken by the [184]*184resident to protect the area from observation by people passing by.
According to the Court in Dunn, these factors help focus the inquiry on the proper question; namely, "whether the area in question is so intimately tied to the home itself that it should be placed under the home's 'umbrella' of fourth amendment protection." Id. Applying these factors to the case at hand, it is obvious that Walker's fenced-in backyard falls within the curtilage of his home.
Because Walker was arrested within the curtilage of his home without a warrant, his arrest was unlawful in the absence of probable cause and exigent circumstances. Assuming that probable cause to arrest existed, the prosecutor did not, at the post-conviction motion hearing, offer proof with respect to exigent circumstances, although the prosecutor was given the opportunity to do so. The prosecutor had the burden of proof to show exigent circumstances. See, e.g., Welsh v. Wisconsin, 466 U.S. 740, 749-50 (1984).16
[185]*185Since we have concluded that Walker's arrest was unlawful, we must now determine whether the lineup and the in-court identifications of Walker by the witnesses are the forbidden fruit of the unlawful arrest. Wong Sun v. United States, 371 U.S. 471 (1963); United States v. Crews, 445 U.S. 463 (1980). There is language in our prior opinions stating that a lineup identification may not be suppressed on the ground that it is the fruit of an illegal arrest. See, e.g., Schaffer v. State, 75 Wis. 2d 673, 679-80, 250 N.W.2d 326 (1977) (quoting State v. Brown, 50 Wis. 2d 565, 570, 185 N.W.2d 323 (1971)). In a more recent case, State v. Cheers, 102 Wis. 2d 367, 306 N.W.2d 676 (1981), this court was confronted with the issue of whether out-of-court and in-court identifications had to be suppressed as the fruit of an allegedly unlawful arrest. In Cheers, this court found the arrest to be lawful and therefore was not required to reach the issue of suppression of the identification evidence. How[186]*186ever, in the case at hand, we are required to reach the issue of whether the identification evidence should be suppressed because we have found that the arrest was unlawful. In light of Crews and Wong Sun, we overrule Brown and Schaffer insofar as they hold that lineup identification evidence may not be suppressed as the fruit of an unlawful arrest.
The primary question in cases such as this one where it is claimed that evidence is the forbidden fruit of an unlawful government act was stated by the Court in Wong Sun:
the . . . apt question in such a case is "whether, granting establishment of the primary illegality, the evidence to which the instant objection is made has been come at by exploitation of that illegality or instead by means sufficiently distinguishable to be purged of the primary taint."
Wong Sun, 371 U.S. at 488 (quoting Maguire, Evidence of Guilt, 221 (1959)). The State has the burden to prove that the identification evidence in question is admissible once the defendant has established the "primary illegality." See Brown v. Illinois, 422 U.S. 590, 604 (1975).
We turn first to the question of whether the lineup identification evidence is the fruit of the unlawful arrest. The lineup, itself, was held on September 5,1986, at 9:30 a.m., approximately twelve hours after Walker's arrest. Five eyewitnesses to the armed robberies, all of whom testified at Walker's trial, viewed the lineup. In determining whether lineup identification evidence from these witnesses should have been admitted at trial, we agree with the suggestion of one commentator that the analysis is the same as the analysis undertaken by the United States Supreme Court in Brown, where the ques[187]*187tion was whether a confession was the fruit of an unlawful arrest. 4 LaFave, Search and Seizure, sec. 11.4(g), at 433 (hereinafter "LaFave"). In Brown, the Court identified three factors relevant to such inquiries:
the temporal proximity of the arrest and the [lineup], the presence of intervening circumstances, and, particularly, the purpose and flagrancy of the official misconduct. . ..
Brown, 422 U.S. at 603-04 (citations omitted).
The first Brown factor — the temporal proximity of the arrest and the lineup — is significant only in the sense that it may reveal the purpose of the arrest (factor three). 4 LaFave, sec. 11.4(g) at 434-35. The second factor is the presence or absence of intervening circumstances. Bringing the defendant before a committing magistrate to advise the defendant of his or her rights and to set bail has been deemed a sufficient intervening circumstance to cleanse the lineup of any taint stemming from an unlawful arrest. Johnson v. Louisiana, 406 U.S. 356, 365 (1972).17 With respect to the third factor, the fact that the arrest was not flagrant and was not for the purpose of putting the defendant before a lineup is not enough alone to validate the lineup. Rather, the absence of this factor merely means that less is required in terms of intervening circumstances. 4 LaFave, sec. 11.4(g), at 434, 435.
Because the record in this case does not permit us to apply these factors to the case at hand, this issue must be resolved on remand. The record shows that a parole hold was placed on Walker the day of the lineup, September 5, 1986, but there is no showing in the record as [188]*188to the precise time that the hold went into effect. A parole hold would be relevant to the "intervening circumstances" factor of the Brown test.
Again, the burden of proof on the question of admissibility is on the prosecution, and this matter is to be resolved at a hearing prior to the trial.
We next turn to the admissibility of the in-court identification of Walker. If on remand the circuit court determines that the lineup identification evidence is the fruit of the unlawful arrest, the circuit court must then determine whether the in-court identification by any witness who viewed Walker in the lineup must also be excluded as the fruit of the unlawful arrest. See United States v. Crews, 445 U.S. 463 (1980). In determining whether an in-court identification is the fruit of an unlawful arrest, the primary question is whether the lineup identification, suppressed as the fruit of an unlawful arrest, has affected the reliability of the in-court identification, making it inadmissible as well. A particular witness’s in-court identification is admissible if the court finds it "rest[s] on an independent recollection of [the] initial encounter with [the perpetrator], uninfluenced by the [lineup] identification[ ] . . .." Id. at 473. The factors relevant to this inquiry are as follows:
the prior opportunity to observe the alleged criminal act, the existence of any discrepancy between any prelineup description and the defendant's actual description, any identification prior to lineup of another person, the identification by picture of the defendant prior to the lineup, failure to identify the defendant on a prior occasion, and the lapse of time between the alleged act and the lineup identification. It is also relevant to consider those facts . . . concerning the conduct of the lineup.
[189]*189United States v. Wade, 388 U.S. 218, 241 (1967) (footnote omitted).18
As has been stated, if on remand the circuit court finds that the lineup identification evidence is the fruit of the unlawful arrest, the circuit court must then determine whether, in light of the factors mentioned in Wade, any in-court identification must also be suppressed as the fruit of the unlawful arrest. The issue of whether any in-court identification of the accused must be suppressed should be resolved at a Goodchild19 hearing, and the burden is on the State to establish by clear and convincing evidence that the particular in-court identification is untainted. See Brown, 50 Wis. 2d at 572, 573.
The third issue this court addresses is whether the circuit court erred when it prevented the jury from hearing evidence about a crime that occurred while Walker was incarcerated, a crime that Walker alleges was similar [190]*190to those for which he was on trial. Walker's offer of proof revealed that at approximately 11:00 p.m. on September 26, 1986, a light-skinned black male with liver spots entered the Koretz Tavern in the city of Kenosha and told the bartender that he wanted the money from the cash register.20 The man spoke quietly and held his right hand inside his jacket, creating the appearance that he had a gun. After receiving the money, he departed on foot. Although the circuit court excluded evidence with respect to this crime, the jury was allowed to hear evidence with respect to two other allegedly similar armed robberies that occurred while Walker was incarcerated.
Walker attempted to have the evidence about the Koretz Tavern robbery admitted on the theory that such evidence was relevant to the issue of his guilt; evidence of crimes similar to those for which he was standing trial that occurred while he was incarcerated could create doubt on the issue of guilt. The circuit court excluded the evidence about the Koretz robbery as irrelevant.21 The circuit court found that the description of the perpetrator of the Koretz Tavern robbery as a light-skinned black male with liver spots did not match any description of the perpetrator in the cases for which Walker was on trial; therefore, the perpetrator of the Koretz robbery could not have been the perpetrator of any of the crimes for which Walker was on trial. In this court, Walker argues that the circuit court's exclusion of the Koretz [191]*191robbery evidence violated his constitutional right to present a defense, relying primarily upon the court of appeals decision in State v. Johnson, 118 Wis. 2d 472, 348 N.W.2d 196 (Ct. App. 1984).
The principles that govern a review of the circuit court's determination on the issue of relevancy are clear. An appellate court must uphold a trial court's determination on an issue of relevancy unless the determination constitutes an abuse of discretion. State v. Pharr, 115 Wis. 2d 334, 345, 340 N.W.2d 498 (1983). In Hartung v. Hartung, 102 Wis. 2d 58, 306 N.W.2d 16 (1981), this court stated the method for reviewing a trial court's discretionary determination:
A discretionary determination, to be sustained, must demonstrably be made and based upon the facts appearing in the record and in reliance on the appropriate and applicable law. Additionally, and most importantly, a discretionary determination must be the product of a rational mental process by which the facts of record and law relied upon are stated and are considered together for the purpose of achieving a reasoned and reasonable determination. It is recognized that a trial court in an exercise of its discretion may reasonably reach a conclusion which another judge or another court may not reach, but it must be a decision which a reasonable judge or court could arrive at by the consideration of the relevant law, the facts, and a process of logical reasoning.
Id. at 66.
As previously stated, the circuit court excluded evidence about the Koretz Tavern robbery, deeming it irrelevant because of the dissimilarity in appearance between the perpetrator of that crime and the perpetrator of any [192]*192of the crimes for which Walker had been charged. The circuit court made the determination based on the facts of the case, the relevant law, and a process of logical reasoning, and the determination is one that a reasonable court could make. Thus, it was. not an abuse of discretion for the circuit court to exclude as irrelevant evidence about the Koretz Tavern robbery. Because the evidence is irrelevant, the exclusion of the evidence did not violate Walker's constitutional right to present a defense since "a defendant has no right, constitutional or otherwise, to present irrelevant evidence." State v. Robinson, 146 Wis. 2d 315, 332, 431 N.W.2d 165 (1988).22
In summary, we conclude that Walker established a prima facie case of purposeful discrimination in the selection of the petit jury and that the prosecution failed to rebut the prima facie case. Walker's conviction, therefore, must be reversed, and he is entitled to a new trial. We further conclude that Walker's warrantless nighttime arrest in his fenced-in backyard violated the fourth amendment to the United States Constitution. On remand, prior to Walker's new trial, the circuit court must conduct a hearing to determine whether, in light of the guidelines set forth in this opinion, the lineup identification evidence must be suppressed as the fruit of Walker's unlawful arrest. If the circuit court finds that the lineup evidence is the fruit of Walker's unlawful arrest, then the court must determine whether, in light [193]*193of the guidelines set forth in this opinion, any lineup identification has affected the reliability of any in-court identification, thus rendering it inadmissible as well. We finally conclude that the circuit court's decision to exclude defense evidence about a crime that occurred while Walker was incarcerated did not constitute an abuse of discretion.
By the Court. — The judgment and order of the circuit court are reversed.