OPINION
The issues raised by appellant after convictions in two separate trials have been consolidated on appeal. For purposes of clarity the two trials are identified as Ar-noldt 1 and Arnoldt II. In Arnoldt I appellant contends that the district court erred in designating a United States Magistrate 1 to preside over the return of the jury’s verdict and in failing to make specific factual findings before imposing a fine. In Arnoldt II he asserts that his trial violated the double jeopardy clause of the fifth amendment to the United States Constitution and that the district court erred in finding that he was an organizer or leader of a criminal activity as defined in the sentencing guidelines. He also asserts that the district court erred in certain evi-dentiary rulings, in instructing the jury, *1122 and in refusing to grant a mistrial. We affirm in part, reverse in part, and remand.
I.
A. Arnoldt I
Arnoldt was indicted in August 1988 for one count of conspiracy to distribute cocaine, 21 U.S.C.A. § 846 (West Supp.1991), four counts of distribution of cocaine, 21 U.S.C.A. § 841(a) (West 1981), one count of carrying a firearm during and in relation to a drug trafficking crime, 18 U.S.C.A. § 924(c)(1) (West Supp.1991), one count of possession of ammunition by a convicted felon, 18 U.S.C.A. § 922(g)(1) (West Supp. 1991), and one count of possession of a firearm by a convicted felon, id. He was convicted of the conspiracy count and three of the distribution counts. He was acquitted of one count of distribution and of carrying a firearm during and in relation to a drug trafficking crime. 2
Following closing argument and the charge to the jury, the district judge announced that he was delegating the responsibility of presiding over the return of the jury’s verdict to a United States Magistrate. Arnoldt did not object to this delegation. The magistrate subsequently received the verdict, polled the jury, and remanded the defendant to custody.
At the sentencing hearing, the district court determined that Arnoldt’s offense level was 26, which, combined with criminal history category IV, produced a sentencing guidelines range of 92-115 months. The district court imposed a sentence of 98 months plus two concurrent 60-month sentences for the ammunition and firearm violations. Additionally, the district court imposed a $5,000 fine and a $300 special assessment.
B. Arnoldt II
On January 10, 1989, Arnoldt was named in 14 counts of an 85 count indictment resulting from an investigation of the Pagan Motorcycle Club. Count 1 alleged that Arnoldt violated 18 U.S.C.A. § 1962(c) (West 1984) of the Racketeer Influenced and Corrupt Organizations Act (RICO); Count 2 alleged that he participated in a RICO conspiracy, 18 U.S.C.A. § 1962(d) (West Supp.1991); Counts 7, 10, 13, and 71 alleged that he distributed controlled substances, 21 U.S.C.A. § 841(a)(1); and Counts 5, 6, 8, 9, 11, 12, 67, and 69 alleged that he engaged in interstate travel in aid of racketeering, 18 U.S.C.A. § 1952(a)(3) (West Supp.1991). The jury convicted Ar-noldt of all counts.
Counts 5 through 13 represented conduct occurring before November 1, 1987 and thus were pre-guidelines offenses. Because the offenses represented in Counts 1, 2, 67, 69, and 71 were committed after November 1, 1987, the sentences were governed by the Sentencing Reform Act of 1984, 18 U.S.C.A. §§ 3551, et seq. (West 1985 & Supp.1991), and the sentencing guidelines promulgated by the United States Sentencing Commission. The guidelines counts were grouped pursuant to U.S.S.G. § 3D1.2. 3 The base offense level for the underlying activity (distribution of over 1,990 grams of cocaine) was 26. U.S.S.G. § 2D 1.1 (a)(3). This level was increased by 2 for possession of a firearm during the commission of a drug offense, U.S.S.G. § 2D 1.1(b)(1), and by 2 for obstruction of justice, U.S.S.G. § 3C1.1. The district court also found that Arnoldt was an organizer or leader of a criminal activity that involved five or more participants or was otherwise extensive, U.S.S.G. § 3Bl.l(a), and therefore further increased his offense level by 4, resulting in an adjusted offense level of 34. Offense level 34 combined with criminal history category V produced a sentencing guidelines range of 235-293 months. The district court sentenced Arnoldt to 292 months imprisonment.
As to the pre-guidelines counts, the court imposed five years imprisonment each on Counts 5, 6, 8, 9, 11, and 12 to be served *1123 concurrently with each other and with the guidelines sentence, 15 years imprisonment on Counts 7 and 10 to be served concurrently with each other and with the guidelines sentence, and 20 years imprisonment on Count 13 to be served concurrently with the guidelines sentence. In addition, the district court ordered the sentence imposed in Amoldt II to be served concurrently with the sentence in Amoldt I.
II.
Arnoldt contends that designating a magistrate to preside over the return of the jury’s verdict in
Arnoldt I
violated the Federal Magistrates Act, 28 U.S.C.A. § 631,
et seq.
(West Supp.1991), and Article III of the United States Constitution. He bases his argument on
Gomez v. United States
in which the Supreme Court unanimously held that the Federal Magistrates Act does not authorize a magistrate to preside over jury selection in a felony trial when a defendant objects.
The Court recently returned to this issue in
Peretz v. United States,
— U.S. —,
Arnoldt first claims that allowing a magistrate to preside over the return of the jury’s verdict violated his right to have an Article III judge preside over his felony trial. Recognizing that criminal defendants often waive substantive constitutional rights by their failure to make a timely assertion of the right, the Peretz Court held that because the defendant had “raised no objection to the judge’s absence” he had waived his right to demand the presence of an Article III judge. Id. Similarly, Arnoldt failed to object to the delegation of authority to the magistrate to preside over the return of the jury’s verdict and, therefore, waived any resulting constitutional error. We conclude that the reasoning of Peretz controls our disposition of this argument.
Next, Arnoldt asserts that the Federal Magistrates Act prohibits magistrates from presiding over the return of the jury’s verdict. However, Arnoldt overlooks the specific approval of this function in the legislative history of the “additional duties” clause. A House Report on the 1976 amendments to the Act explained that the “additional duties” clause “would permit, for example, a magistrate to review default judgments, order the exoneration
*1124
or forfeiture of bonds in criminal cases,
and accept returns of jury verdicts where the trial judge is unavailable.”
H.R.Rep. No. 1609, 94th Cong., 2d Sess. 12,
reprinted in
1976 U.S.Code Cong.
&
Admin.News 6162, 6172 (emphasis added). Heeding this “clear legislative command” when confronted with identical facts, the Sixth Circuit held that the district court did not err in permitting a magistrate to receive the verdict in a criminal case.
United States v. Day,
III.
After the parties filed their briefs but prior to oral argument the Supreme Court announced its decision in
Grady v. Corbin,
A.
The double jeopardy clause of the fifth amendment provides that a defendant shall not “be subject for the same offence to be twice put in jeopardy of life or limb.” U.S. Const. amend. V. The clause “protects against a second prosecution for the same offense after acquittal. It protects against a second prosecution for the same offense after conviction. And it protects against multiple punishments for the same offense.”
North Carolina v. Pearce,
Grady,
however, finding
Blockburger
afforded inadequate protection to defendants successively prosecuted, fashioned a new rule. In
Grady,
defendant Corbin drove his vehicle across the center line of a road, striking two oncoming vehicles. The driver of one of the oncoming vehicles subsequently died as a result of injuries sustained. Corbin pled guilty to misdemeanor driving while intoxicated and failing to keep right of the median and was sentenced to a $350 fine, a $10 surcharge, and a 6-month license revocation. Subsequently, a grand jury indicted Corbin for reckless manslaughter, vehicular manslaughter, criminally negligent homicide, reckless assault and driving while intoxicated. The Supreme Court affirmed the judgment of the New York Court of Appeals that prosecution of Corbin for these charges was prohibited by the double jeopardy clause. Observing that the
Blockburger
test was conceived “ ‘in the context of multiple punishments imposed in a single prosecution,’ ”
Grady,
[A] technical comparison of the elements of the two offenses as required by Block-burger does not protect defendants sufficiently from the burdens of multiple trials.... [A] subsequent prosecution must do more than merely survive the Blockburger test.... [T]he Double Jeopardy Clause bars any subsequent prosecution in which the government, to establish an essential element of an offense charged in that prosecution, will prove conduct that constitutes an offense for which the defendant has already been prosecuted.
Id.
B.
Arnoldt was indicted in Count 1 of Ar-noldt II for a RICO violation under 18 U.S.C.A. § 1962(c). The indictment alleged that Arnoldt committed eight predicate acts. The first four predicate acts constituted four counts of drug-related conduct for which Arnoldt had been convicted in Arnoldt I and which occurred between January and June 1988. The remaining four predicate acts incorporated by reference four substantive counts in Arnoldt 77-three counts alleging cocaine distribution occurring from April to June 1986 and one count alleging interstate travel in aid of racketeering occurring on June 12, 1988. 6
Arnoldt asserts that use of his Arnoldt I convictions as predicate acts in a subsequent RICO prosecution violates the double jeopardy clause. He contends that Grady compels reversal of the subsequent RICO conviction because to establish an essential element of the RICO count (i.e., the predicate acts), the government proved conduct constituting offenses for which he had been convicted in Arnoldt I.
It is undisputed that under the circumstances here the successive prosecution of Arnoldt satisfies the
Blockburger
test.
See, e.g., United States v. Grayson, 795
F.2d 278, 283 (3d Cir.1986) (“successive prosecutions for a RICO offense and its underlying predicate offenses are not inconsistent with the double jeopardy clause”),
cert. denied,
In
Garrett v. United States,
The Supreme Court found dubious the defendant’s argument that the importation conviction was a lesser included offense of the CCE. The Court observed that the lesser included offense doctrine is associated with
Brown v. Ohio,
Obviously the conduct in which Garrett was charged with engaging in the [CCE] indictment, when compared with that with which he was charged in the Washington indictment, does not lend itself to the simple analogy of a single course of conduct — stealing a car — comprising a lesser included misdemeanor within a felony. Here the continuing criminal enterprise was alleged to have spanned more than five years; the acts charged in the Washington indictment were alleged to have occurred on single days in 1979 and 1980.... Whenever it was during the 5V2-year period alleged in the indictment that Garrett committed the first of the three predicate offenses required to form the basis for a CCE prosecution, it could not then have been said with any certainty that he would necessarily go ahead and commit the other violations required to render him liable on a CCE charge. Every minute that Nathaniel Brown drove or possessed the stolen automobile he was simultaneously committing both the lesser included misdemeanor and the greater felony, but the same simply is not true of Garrett_ These significant differences caution against ready transposition of the “lesser included offense” principles of double jeopardy from the classically simple situation presented in Brown to the multilayered conduct, both as to time and to place, involved in this case.
Garrett,
We believe the principles enunciated in
Grady
govern the paradigmatic “single course of conduct” case, but that prosecutions under statutes such as RICO and CCE — statutes targeted at “multilayered” instances of criminal conduct invariably occurring at different places and times — call for a calculus reflecting the concerns expressed in
Garrett.
The Third and Eleventh Circuits have adopted a nearly identical interpretation of
Grady,
distinguishing successive prosecutions for RICO and its underlying predicates, which these courts held to be constitutionally permissible, from
Brown
and
Grady,
which involved a single course of conduct.
United States v.
*1127
Pungitore,
We recognize that
Grady
does not limit itself to a specific class of crimes. We also appreciate the bedrock principle underlying the double jeopardy clause itself: “that the State with all its resources and power should not be allowed to make repeated attempts to convict an individual for an alleged offense, thereby subjecting him to embarrassment, expense and ordeal and compelling him to live in a continuing state of anxiety and insecurity....”
Green v. United States,
Thus, in the context of successive prosecutions for a substantive RICO violation and for the predicate crimes used to prove RICO, the double jeopardy analysis is controlled by
Garrett.
8
See Pungitore,
IV.
In
Arnoldt I,
the district court imposed a fine of $5,000 payable in monthly installments. Arnoldt contends the district court failed to adequately consider the factors set forth in 18 U.S.C.A. § 3572 (West Supp.1991).
Cf.
U.S.S.G. § 5E4.2(d) (listing factors court “shall consider” in determining amount of fine). In
United States v. Harvey,
*1128 V.
Arnoldt next contends that the district court erred in finding that he was an organizer or leader of a criminal activity and increasing his offense level by 4.
See
U.S.S.G. § 3Bl.l(a). A determination by the district court of a defendant’s role in the offense is a factual determination and is thus reviewable under the clearly erroneous standard.
United States v. Daughtrey,
the exercise of decision making authority, the nature of participation in the commission of the offense, the recruitment of accomplices, the claimed right to a larger share of the fruits of the crime, the degree of participation in planning or organizing the offense, the nature and scope of the illegal activity, and the degree of control and authority exercised over others.
U.S.S.G. § 3B1.1, comment, (n. 3).
At the sentencing hearing the district court determined that Arnoldt was an organizer based on his perceived membership in the “mother club,” the governing body of the Pagan Motorcycle Club, and his alleged presidency of the Kentucky chapter of the Pagans. However, because the government conceded at oral argument that Ar-noldt was not a member of the mother club, we remand on this issue. Because the record was not adequately developed we offer no opinion on the significance of Arnoldt’s alleged presidency of the local Kentucky chapter.
VI.
In conclusion, we affirm Arnoldt’s convictions and find his remaining contentions to be without merit. However, we vacate the sentence imposed in Arnoldt I and remand for consideration of the statutory factors. We also vacate the guidelines sentence imposed in Arnoldt II and remand for a determination of Arnoldt’s role in the offense.
AFFIRMED IN PART, VACATED IN PART, AND REMANDED.
Notes
. Pursuant to Act of December 1, 1990, Pub.L. No. 101-650, § 321, 104 Stat. 5117, United States Magistrates appointed under 28 U.S.C.A. § 631 (West Supp.1991) are now known as United States Magistrate Judges.
. The district court had previously granted Ar-noldt’s motion to sever the possession of ammunition and firearm counts and Arnoldt was convicted of these counts at a subsequent trial.
. All references are to the October, 1988 version of the Guidelines Manual.
. Following oral argument of Arnoldt’s appeals the Supreme Court granted certiorari in
Peretz
to address the questions of whether delegation of jury selection in a federal felony trial to a magistrate violated the Federal Magistrates Act or Article III when the defendant consented to the delegation and, if so, whether the defendant’s consent constituted a waiver of the violation. — U.S.-, ill S.Ct. 781,
. We disagree with the government’s contention that Arnoldt waived the double jeopardy argument.
. Because special interrogatories were not submitted to the jury it is impossible to know the predicate acts on which the jury relied in finding Arnoldt guilty of violating RICO.
. The Court went on, however, to assume that Garrett’s Washington offense was a lesser included offense in order to reject his double jeopardy claim on the ground that the CCE offense had not been completed at the time Garrett was indicted in Washington.
Id.
. This court recently addressed the application of
Grady
to a prosecution for conspiracy to distribute cocaine and heroin under 21 U.S.C.A. § 846 (West Supp.1991) in which evidence of an episode of defendant’s possession of cocaine and heroin that had formed the basis of a previous prosecution for possession with intent to distribute in violation of 21 U.S.C.A. § 841(a)(1) (West 1981) was introduced as evidence of defendant’s participation in the conspiracy.
United States v. Clark,
