and reproduction, see id.; Roe v. Wade, 410 U.S. 113, 93 S.Ct. 705, 35 L.Ed.2d 147 (1973), nor does it involve any fundamental parental right, see Pierce v. Society of Sisters, 268 U.S. 510, 45 S.Ct. 571, 69 L.Ed. 1070 (1925) (choice of child’s education); Wisconsin v. Yoder, 406 U.S. 205, 92 S.Ct. 1526, 32 L.Ed.2d 15 (1972) (choice of child’s religious practices). Therefore, no “family” interest of constitutional stature is implicated here.
Moreover, past substantive due process cases based on “family” interests all have involved systematic regulation of the interest, Doe v. Irwin, 615 F.2d 1162, 1168 (6th Cir. 1980). See, e. g., Griswold v. Connecticut, 381 U.S. 479, 85 S.Ct. 1678, 14 L.Ed.2d 510 (birth control — statute); Moore v. City of East Cleveland, 431 U.S. 494, 97 S.Ct. 1932, 52 L.Ed.2d 531 (extended family—zoning ordinance); Cleveland Board of Education v. LaFleur, 414 U.S. 632, 94 S.Ct. 791, 39 L.Ed.2d 52 (1974) (maternity leave— school regulations). Here we have only a single, isolated intrusion, with no apparent threat of repetition. We choose to keep our constitutional powder dry against the day when we are shown that repetitions have occurred or even that this kind of conduct has become regular police policy.
D. Sixth Amendment
Even if the police violated Reggie’s Miranda rights, Clara Penn has no standing to assert the violation. United States v. Pruitt, 464 F.2d 494, 495 (9th Cir. 1972). The Sixth Amendment does not prohibit the introduction against her at trial of Reggie’s statements or any evidence derived from them.
III. Non-Constitutional Grounds
A. Supervisory Power
Although if we were to affirm the suppression order it would be more appropriate for us to do so under our supervisory power than under the Constitution, we decline to exercise our supervisory power in this case. The role of the supervisory power is not “to give the federal judiciary a ‘chancellor’s foot’ veto over law enforcement practices of which it [does] not approve.” United States v. Russell, 411 U.S. at 435, 93 S.Ct. at 1644 (quasi-entrapment); see also Hampton v. United States, 425 U.S. 484, 493, 96 S.Ct. 1646, 1651, 48 L.Ed.2d 113 (1976) (Powell, J., concurring in the judgment); id. at 490, 96 S.Ct. at 1650 (plurality opinion). We have recently stated that although “we could neither endorse nor condone” using an improper source of funds to pay an informant to testify, “resort to the exercise of the Court’s supervisory power [to strike the testimony] would be an improper use of the power merely to foreclose law enforcement practices which we do not approve.” United States v. Shelton, 588 F.2d 1242, 1246 (9th Cir. 1978), cert. denied, 442 U.S. 909, 99 S.Ct. 2822, 61 L.Ed.2d 275 (1979).
The Sixth Circuit has gone further, holding that
the traditional area for exercising [supervisory] powers has been within the framework of judicial proceedings. . It is quite another matter, however, to extend the court’s supervisory power to areas outside this traditional domain of the court. To do so here, where the government conduct does not offend a personal right of any defendant, would be directly “to give the federal judiciary a ‘chancellor’s foot’ veto over law enforcement practices of which it did not approve.” . . . This is particularly so where, as here, no precise violation of any penal statute by the officers in question is shown.
United States v. Leja, 563 F.2d 244, 247 (6th Cir. 1977) (quasi-entrapment), cert. denied, 434 U.S. 1074, 98 S.Ct. 1263, 55 L.Ed.2d 780 (1978).
The same palliative factors that we considered supra persuade us that, although we disapprove of the policeman’s conduct, this is not an appropriate case in which to exercise our extraordinary supervisory power and exclude the challenged evidence.
B. Privilege
Federal Rule of Evidence 501 declares that the existence and extent of priv