OPINION OF THE COURT

ALLEN, J.

The trial court, sitting without a jury, found defendants guilty of extortion by accusation. MCLA 750.213; MSA 28.410. On September 28, 1973, the trial court sentenced Plamondon to five years' probation, and sentenced Blazier to two years' probation.

This case arises out of an incident which occurred January 31, 1973, when defendants entered the home rented by Uwe Wagner, a self-confessed drug dealer in Honor, Michigan. Defendants came to collect $3,000 which Wagner apparently owed Blazier in exchange for 25 pounds of marijuana which Blazier had sold to Wagner in the first part of January, 1973. Defendants threatened Wagner, stating that his failure to pay the $3,000 would result in Wagner suffering broken arms and legs. Defendants further threatened Wagner that they would expose him as a "rip-off artist" and would inform various governmental agencies that Wagner was an opium pusher. Plamondon apparently told Wagner to come up with the money by Valentine's Day, and directed Wagner's attention to the infamous St. Valentine's Day Massacre. Various personal articles of Wagner's, including his stereo speakers, his social security card, alien registration card and draft registration card, as well as a water pipe, some clothing and some other pipes utilized in the consumption of various controlled substances, were taken by defendants as "collateral" for the money which Wagner allegedly owed Blazier.

The day after defendants departed from Wagner's home, Wagner contacted an attorney who arranged protective custody for Wagner in the Antrim county jail. Subsequent thereto, he discussed what had occurred with a state police officer who in turn contacted officers from the state police headquarters in East Lansing. On February 26, 1973, Wagner, at the suggestion of Detective Sergeant Robert F. Ward of the intelligence section of the Michigan State Police, telephoned Plamondon to discuss Plamondon's role in the affair and Wagner's apparent ability to pay the defendants shortly. Another phone call was made February 27, at which time the same matters were discussed. Both calls were made by Wagner from Sgt. Ward's room 133 in the Foxhouse Motel located in Traverse City and while Officer Ward was present.

Both of the above phone calls were tape recorded, and the tapes were played at trial and admitted into evidence over defense counsel's objection. Sgt. Ward placed an induction coil onto the earpiece of the telephone, and the recording was fed into a tape recorder. While the officer, who was present in the motel room, could hear Wagner speak, he had to replay the tape to hear what Plamondon was saying, and did so immediately after the call was completed. Ward testified that after meeting Wagner during the afternoon of February 26, he suggested that the taped telephone calls be made to Plamondon. Ward had been assigned to the case on February 23, and after speaking with Wagner, decided that the proper thing to do would be to call Plamondon who, based upon Wagner's recital of the event, seemed to be the person in charge.

The above facts have framed defendants' initial claim on appeal, namely, whether defendants' right to be free from unreasonable searches and seizures, US Const, Am IV and Const 1963, art 1, § 11, was violated when tapes of those two telephone conversations between defendant and the complaining witness Wagner were admitted into evidence, where the conversations were obtained without obtaining prior judicial authorization in the form of a warrant. This case presents a second claim of error — that defendants were the victims of a discriminatory and politically-based prosecution in light of the history of the relationship between various state law enforcement agencies and members of defendants' political organization (Rainbow People's Party), the resources expended and devoted to the investigation and prosecution of defendants, and the decision by the prosecutor not to pursue enforcement actions against Wagner, the informant, but rather pursuing this case against defendants.

Relying upon Katz v United States, 389 U.S. 347; 88 S Ct 507; 19 L Ed 2d 576 (1967), defendants argue that the trial court erred in admitting into evidence the tapes and transcripts thereof of two telephone conversations had between Wagner and defendant where, without prior judicial authorization, the State Police monitored a phone call (at Wagner's end of the line) and recorded the same. The prosecutor responds, and relies upon United States v White, 401 U.S. 745; 91 S Ct 1122; 28 L Ed 2d 453 (1971), for the proposition that the constitutional protection against unreasonable searches and seizures is inapplicable to such a situation. Research has disclosed that our Court has previously declined to apply Katz to the warrantless eavesdropping and recording of a telephone call made with the cooperation of a police informant or the complaining witness. People v Drielick, 56 Mich. App. 664, 667; 224 N.W.2d 712 (1974), People v Rappuhn, 55 Mich. App. 52, 59-60; 222 N.W.2d 30 (1974), lv den, 393 Mich. 808 (1975), and People v Karalla, 35 Mich. App. 541, 545; 192 N.W.2d 676 (1971), lv den, 386 Mich. 765 (1971). Further, our Court in People v Bruno, 30 Mich. App. 375, 382-383; 186 N.W.2d 339 (1971), applied the pre- Katz decision of Rathbun v United States, 355 U.S. 107; 78 S Ct 161; 2 L Ed 2d 134 (1957), to find no violation of defendant's rights. Recently, the Michigan Supreme Court found that the warrantless monitoring of a conversation between defendant and an informant who was equipped with a radio transmitter under his shirt and who transmitted the conversation to police officers violated defendant's right to be free from unreasonable searches and seizures, and in particular bottomed its decision upon Michigan's constitutional protection against the same, Const 1963, art 1, § 11. People v Beavers, 393 Mich. 554; 227 N.W.2d 511 (1975). However, that opinion limited itself to prospective application, and we are thus unable to specifically predicate our decision upon it.

At the outset of our discussion, we note that Rathbun, supra, was not a constitutional case, but rather was based upon a specific Federal statute which was concerned with the interception and divulging of communications. A subsequent decision dealing with the same statutory provision, 47 U.S.C. § 605, found error in light of the facts therein, but specifically noted that the Fourth Amendment claim was not decided and that the opinion was limited to the statutory grounds. Lee v Florida, 392 U.S. 378, 379; 88 S Ct 2096, 2097; 20 L Ed 2d 1166 (1968). Thus, the Lee-Rathbun line of cases cited in Bruno, supra, would be inapplicable to a constitutional claim.

In Katz, supra, the public telephone booth from which defendant had made a telephone call was "bugged" and law enforcement officials were able to listen to and record defendant's words. In the course of its discussion, Katz, supra, noted that "What a person knowingly exposes to the public, even in his home or office, is not a subject of Fourth Amendment protection." 389 US at 351; 88 S Ct at 511; 19 L Ed 2d at 582. The Court said that Katz, making a telephone call in a public telephone booth, had a right to "rely upon the protection of the Fourth Amendment", and that he was "entitled to assume that the words he utter[ed] into the mouthpiece [would] not be broadcast to the world". 389 US at 352; 88 S Ct at 511-512; 19 L Ed 2d at 582. Katz, supra, further noted that the Fourth Amendment governed "the recording of oral statements * * *", and that the government's use of an electronic device to listen to and record defendant's statements "violated the privacy upon which he justifiably relied while using the telephone booth", and therefore was found to be "a `search and seizure' within the meaning of the Fourth Amendment". 389 US at 353; 88 S Ct at 512; 19 L Ed 2d at 583. Katz, supra, noted that electronic surveillance did not come within the specific exceptions to the warrant requirement (incident to arrest, hot pursuit), pointed out that the nature of the police activity "preclude[d] its use pursuant to the suspect's consent", consent and rejected the argument that electronic surveillance of a phone booth constituted a separate exception to the warrant requirement. 389 US at 357-358; 88 S Ct at 514-515; 19 L Ed 2d at 585-586.

United States v White, 401 U.S. 745, 746-747; 91 S Ct 1122, 1123; 28 L Ed 2d 453, 456 (1971), upon which the prosecutor relies, involved the use, by a government informant, of a radio transmitter concealed on his person which transmitted conversations entered into between defendant and the informant to government agents who could overhear the conversations by monitoring the frequency of the transmitter. Mr. Justice White, speaking for himself and three other justices, rejected the argument that Katz, supra, precluded the admission into evidence of the agent's testimony regarding the overheard conversations. In the course of his discussion, Mr. Justice White referred to the "misplaced confidence" decision of Hoffa v United States, 385 U.S. 293; 87 S Ct 408; 17 L Ed 2d 374 (1966), which afforded no Fourth Amendment protection to defendant engaged in a personal confrontation with an informant barren of electronic surveillance equipment, Lewis v United States, 385 U.S. 206; 87 S Ct 424; 17 L Ed 2d 312 (1966), involving a personal encounter between defendant and a nonelectronically equipped narcotics agent who concealed his identity to purchase narcotics from defendant, and Lopez v United States, 373 U.S. 427; 83 S Ct 1381; 10 L Ed 2d 462 (1963), which also involved a personal meeting between defendant and a government agent who was equipped with a pocket tape recorder but who had been invited to defendant's office and with whom defendant spoke voluntarily. Relying upon the above, Justice White concluded that because police agents acting by themselves could participate in warrantless activities, the mere introduction of electronic aids should not carry the case to the proportions of a Fourth Amendment violation. 401 US at 751-753; 91 S Ct at 1126-1127; 28 L Ed 2d at 458-460.

Because White, supra, was decided some four years after Katz, supra, it would appear at first blush that the monitoring in the case before us was not a violation of Fourth Amendment protection. For reasons which we now spell out in detail, we do not agree. Mr. Justice Harlan wrote the major dissenting opinion in White, supra, and in the course thereof distinguished the "misplaced confidence" situation from the problem in which a third party, unknown to defendant, may be listening to the conversation. 401 US at 776-777; 91 S Ct at 1138; 28 L Ed 2d at 472-473. This monitoring was not present in the cases referred to in Justice White's opinion. We have seen that in Hoffa, supra, the informant personally met with defendant then repeated the conversation to police officers. Lewis v United States, supra, also involved a personal encounter and no electronic surveillance. Defendant therein knowingly invited the agent into his home to engage in a narcotic transaction. While a pocket tape recorder was involved in Lopez v United States, supra, defendant therein specifically consented to speak to the agent in person. Harlan stated that On Lee v United States, 343 U.S. 747; 72 S Ct 967; 96 L Ed 1270 (1952), could "no longer be regarded as sound law", 401 US at 769; 91 S Ct at 1134; 28 L Ed 2d at 468, and subsequently referred to the general proposition that "official investigatory action that impinges on privacy must typically, in order to be constitutionally permissible, be subjected to the warrant requirement". 401 US at 781; 91 S Ct at 1140; 28 L Ed 2d at 475. Harlan noted the distinctions between the situation in White, supra, and the Lopez, Lewis, Hoffa cases, which we have noted above, and concluded that the citizens of our country should not be burdened with "the risks of the electronic listener or observer without at least the protection of a warrant requirement". 401 US at 784-786; 91 S Ct at 1142-1143; 28 L Ed 2d at 477-478.

Mr. Justice Harlan's views as to the purpose of the Fourth Amendment's warrant requirement, bear a resemblance to a statement made by former Justice COOLEY in Weimer v Bunbury, 30 Mich. 201 (1874), a civil suit involving a public levy upon the petitioner's property. In the course of rejecting the argument that Const 1850, art 6, § 26, a predecessor to Const 1963, art 1, § 11, had been violated when the petitioner's property had been seized and levied upon, Justice COOLEY said that the purpose of this constitutional protection against unreasonable searches and seizures:

"was to make sacred the privacy of the citizen's dwelling and person against everything but process issued upon a showing of legal cause for invading it". 30 Mich at 208.

In light of the well-established purpose of Michigan's constitutional protection against unreasonable searches and seizures, and former Justice Harlan's discussion of the Federal protection against the same, we are prepared to state that our Court should adhere to Harlan's rather than White's views on this question. Michigan is not bound by plurality opinions of the United States Supreme Court, it having been stated that where there is no agreement by a majority of the United States Supreme Court on the ground of a decision, that decision is not binding precedent for subsequent cases. People v Anderson, 389 Mich. 155, 170; 205 N.W.2d 461 (1973). As noted earlier, Mr. Justice White and three other justices specifically agreed with his Fourth Amendment analysis, whereas Justice Black concurred in the judgment of the case.

Further support for our conclusion that we should not be bound by Mr. Justice White's opinion is the fact that the White, supra, decision necessarily had to be premised on pre- Katz, supra, law. In fact, Mr. Justice White, the three other members who previously joined him, as well as Mr. Justice Brennan who specifically concurred in the result in light of Desist v United States, 394 U.S. 244; 89 S Ct 1030; 22 L Ed 2d 248 (1969), specifically said that White, supra, which involved electronic surveillance which occurred in late 1965 and early 1966, previous to the December 18, 1967 date of the Katz, supra, decision, had to be bound by pre- Katz, supra, law in light of the Desist opinion which had held that Katz, supra, was not retroactive. 401 US at 754; 91 S Ct at 1127; 28 L Ed 2d at 460. The Court in White, supra, had to apply the pre- Katz decisions, most notably On Lee, supra. Our case involves electronic surveillance which occurred subsequent to the date of the Katz, supra, decision, and we find that the result in White, supra, premised upon pre- Katz, supra, law, to be inapplicable to our case. See Holmes v Burr, 486 F.2d 55, 71 (CA 9, 1973) (Hufstedler, J., dissenting), cert den, 414 U.S. 1116; 94 S Ct 850; 38 L Ed 2d 744 (1973).

As to the merits in the present case, we make the following observations. Unlike the "face-to-face" situations found in the previously distinguished cases relied upon by Mr. Justice White, defendant herein did not know that Police Officer Ward, seated in the officer's motel room with Wagner, was monitoring and recording defendant's telephone call with Wagner. While Wagner, an admitted drug dealer, of course cooperated with the police to obtain this incriminating evidence against defendant, defendant was obviously, by the nature of electronic surveillance and the goal of this operation, not apprised of what was going on. It would seem absurd to find that defendant had somehow consented to this activity. To say that Wagner's consent would suffice would seem to run afoul of the rule in Stoner v California, 376 U.S. 483; 84 S Ct 889; 11 L Ed 2d 856 (1964), wherein it was held that the hotel manager could not consent to a search of a guest's room. That person's Fourth Amendment protections were personal and could not be waived by a hotel manager. Wagner obviously "knowingly exposed" his words to the officer and the tape recorder, but Plamondon did not.

Our decision not to adhere to the approach of Mr. Justice White's opinion, but rather to follow the principle of Katz, supra, does not in any way preclude the use by police of this important law enforcement tool. Rather, our opinion merely requires that a warrant be issued by a judicial officer after a showing of probable cause has been made. While perhaps the facts herein could support such a finding, ex post facto justifications or rationales which might have supported the issuance of a warrant previous to the wiretapping, cannot be used to save the case from a finding of error. Katz, supra, 389 US at 356; 88 S Ct at 514; 19 L Ed 2d at 585. Because the officers failed to secure a warrant previous to engaging in this sort of activity, we find that defendants' right to be free from unreasonable searches and seizures was violated and that reversible error was committed when the tapes and transcripts of the overheard conversations were introduced into evidence. Defendants are therefore entitled to a new trial.

The second claim of error contains two assertions: first, that the decision to prosecute defendants, and the manner in which the prosecution was handled, was done so with an "evil eye" and an "unequal hand", contrary to the principles of Yick Wo v Hopkins, 118 U.S. 356; 6 S Ct 1064; 30 L Ed 220 (1886), and second, that defendants' rights of free speech and association, US Const, Am I and Const 1963, art 1, §§ 3 and 5, were also violated because their prosecution was politically motivated and that it had a chilling effect not only upon defendants themselves but upon their political organization as well.

Defendants' first contention is without merit. It is, of course, well established that constitutional provisions forbid discriminatory enforcement of laws and the prosecution for the alleged violations thereof. However, a violation of equal protection will not be found unless the decision to prosecute was based upon religion, race, or some other arbitrary or invidious classification. Defendants have failed to make an affirmative showing that the decision to prosecute them was premised upon such a classification, and we must find that this part of their argument is without merit. See Sponick v Detroit Police Department, 49 Mich. App. 162, 205-206; 211 N.W.2d 674 (1973), and cases cited therein, and People v Smyers, 47 Mich. App. 61, 66-67; 209 N.W.2d 281 (1973), lv granted, 391 Mich. 766 (1974), and cases cited therein as well. Thus, the balance of our opinion will be concerned with defendants' assertion that their rights of speech and political association were violated when they were charged with armed robbery, conspiracy to commit extortion, extortion, and conspiracy to commit criminal usury, faced trial on all but the armed robbery counts, and were convicted by the trial court, sitting without a jury, of one count of extortion by threat of accusation. MCLA 750.213; MSA 28.410.

Defendants have referred the Court to a number of Federal decisions in which courts have found discriminatory prosecutions in violation of First Amendment freedoms, and have urged that we apply the principles of those cases to the instant problem. In United States v Crowthers, 456 F.2d 1074, 1076 (CA 4, 1972), defendants, participants in an Episcopal "Mass. for peace" on the Pentagon concourse, were arrested for violating GSA regulations regarding disorderly conduct and the distribution of handbills. It was established that other religious services had been held on the concourse, and that the participants therein had not faced arrest where those services were in support of the armed forces or the health of the president. Further, there had been band recitals, a vice presidential speech, and a presentation by the West Point Choir, all of which were as loud, if not louder than the noise generated by defendants' "Mass. for peace". Crowthers reversed defendants' convictions on the grounds that they were selectively prosecuted or subjected to the unequal and oppressive application of the regulations. 456 F.2d at 1078-1079. Crowthers said that the government could not pick and choose between those who could demonstrate and utilize the facilities of the concourse and those who could not. Unlike defendants in Crowthers, defendants were not subject to the unequal or oppressive application of the extortion laws, and defendants have failed to present any evidence disclosing the state government's favorable view of some extortionists while pursuing the prosecution of instant defendants.

Likewise, United States v McLeod, 385 F.2d 734, 739-740 (CA 5, 1967), which incidentally was premised upon 42 U.S.C. § 1971 rather than the Constitution, held that the above statute was violated when voting registration volunteers in Selma, Alabama were subject to harrassment by local officials and were arrested while they were engaged in various voter registration activities. The Court found that there had been a well-established pattern of "baseless arrest", 385 F.2d at 741 and, as in Crowthers, supra, the defendants in McLeod were engaged in protected First Amendment activities when they were subjected to the baseless law enforcement. Such was not the case before us.

In United States v Steele, 461 F.2d 1148, 1150 (CA 9, 1972), four vocal and active critics of the United States government's census were arrested and prosecuted for their refusal to answer questions asked by the census taker. These persons, active in the census resistance movement in Hawaii, were able to establish that other persons, who also refused to answer but who were less vocal and less public in their expression of displeasure with the census, were not subjects of prosecution. Unlike defendants in Steele, who were able to obtain relief, defendants herein, while advocates for the legalization of marijuana and active participants in the Rainbow People's Party, were prosecuted for crimes unrelated to the exercise of their rights of free speech and association. Defendants were not prosecuted, in this case, for using, possessing, or selling marijuana, or for advocating the same, but rather were prosecuted for extortion.

In United States v Falk, 479 F.2d 616, 619 (CA 7, 1973), a leader in the Chicago area draft resistance was subject to prosecution for failure to carry his draft card, a violation of 50 U.S.C. App 462, and his refusal to submit for induction. Falk noted the general rule that discriminatory prosecution based upon defendant's exercise of First Amendment freedoms is forbidden, 479 F.2d at 620, and referred to the fact that defendant, contrary to established selective service policy not to prosecute those who failed to carry a draft card, was singled out for prosecution. 479 F.2d at 621.

While in the instant case the Attorney General's Department was involved in the prosecution of defendants, rather than the local prosecutor, that action was justified on the grounds that there was no elected local prosecutor at the time involved in this case. Further, none of the factors discussed in Falk were involved in our case, and once again we must refer to the fact that defendants' acts of extortion were unrelated to any protected First Amendment activity.

In United States v Berrigan, 482 F.2d 171, 176-177 (CA 3, 1973), the Court found no discriminatory prosecution of defendants who had sent letters in and out of prison and who had been charged with conspiracy to kidnap Henry Kissinger, destroy the underground heating system in Washington, D.C., and raid draft boards. Despite the fact that about 100 FBI agents had been waiting outside of a church to capture the brother of one of the defendants, that agents had engaged in surveillance of one of the defendants and that the director of the FBI had made public his personal views of the incident, the Court found that defendants' activities and plans were outside the parameters of the First Amendment and that they failed to establish their claim of discriminatory prosecution. 482 F.2d at 177-179. Likewise, despite the fact that the Michigan State Police and the Attorney General's office were involved in the prosecution of defendants, that these officers cooperated with the Ann Arbor police department in the arrest of defendants, that a res gestae witness was interviewed in Massachusetts and that an aerial photograph was taken of the scene of the arrest, we find that defendants' claim that they were subject to discriminatory prosecution is without merit. Although active in the Rainbow People's Party and advocates for a number of anti-establishment causes, their prosecution was basically limited to a violation of the state's criminal law prohibiting extortion, and defendants have failed to show that other alleged extortionists with pro-establishment viewpoints were not subjects of prosecution.

Examination of the trial court's opinion discloses that the trial judge acquitted defendants on a number of charges, found them guilty only of extortion by accusation, pointed out that the Attorney General was needed in Benzie County due to the lack of a local elected prosecutor, noted that the Rainbow People's Party was not on trial, that the issue of marijuana was not on trial, and analyzed the specific facts involved in the case in the course of reaching his conclusions. Further, at sentencing, the trial court stated that defendants' political views had nothing to do with the sentence, and specifically said that they may engage in political activities while on probation. There is no merit to defendants' claim that they were discriminated against in this case.

Reversed and remanded for new trial pursuant to our resolution of the first issue.

D.E. HOLBROOK, JR., J., concurred.