OPINION
ROTH, Circuit Judge.
The DNA Analysis Backlog Elimination Act of 2000 (DNA Act), 42 U.S.C. §§ 14135 — -14135e (2001 Supp.), mandates the collection of DNA samples from prisoners, parolees, and individuals on probation and supervised release who have committed certain qualifying offenses. While Paul Sczubelek was on supervised release, he refused his probation officer’s direction to give a DNA sample. The District Court ordered him to do so. Sczubelek appealed on the grounds that the collection of a DNA sample is an unconstitutional search in violation of the Fourth Amendment and also in violation of the separation of powers doctrine. Prior to oral argument in this appeal, Sczubelek finished serving his term of supervised release. For this rea[177]*177son, he now also asks that we dismiss his appeal as moot because the District Court no longer has jurisdiction over him to enforce its order.
We conclude first of all that this case is not moot. The District Court’s jurisdiction extended beyond the expiration of Sczubelek’s term of supervised release because, while Sczubelek was still serving his term of supervised release, the court issued a summons based on a violation of a condition of his release and the delay between the expiration of his term and the adjudication of the violation is “reasonably necessary.” See 18 U.S.C. § 3583(i). Turning to the merits of his appeal, we conclude that under Fourth Amendment reasonableness standard for analyzing the constitutionality of government searches and seizures, the collection of DNA samples from individuals on supervised release is constitutional. The government’s interest in building a DNA database for identification purposes, similar to its interest in maintaining fingerprint records, outweighs the minimal intrusion into a criminal offender’s diminished expectation of privacy. We conclude finally that there is no violation of the separation of powers doctrine in the assignment to the U.S. Probation Office of the taking of the DNA samples.
I. FACTS AND PROCEDURAL HISTORY
On June 17, 1994, a jury convicted Paul Sczubelek of three counts of bank robbery under 18 U.S.C. § 2113(a) and one count of structuring cash transactions under 31 U.S.C. §§ 5322(a) and 5324(3). On September 16, 1994, the District Court sentenced Sczubelek to 87 months of imprisonment and three years of supervised release. The conditions of Sczubelek’s term of supervised release did not expressly include submitting a DNA sample. Sczubelek was released from prison in August 2000 and placed on home confinement until he began serving his term of supervised release on October 6, 2000. Shortly thereafter, Congress enacted the DNA Act. The submission of a DNA sample then became a mandatory condition of supervised release. Approximately one year after Sczubelek commenced serving his term, a probation officer informed Sczubelek that he must submit to DNA collection on September 25, 2002. Sczubelek refused.
On October 1, 2002, the Probation Office filed a petition for violation of a mandatory condition of supervised release. On October 15, the District Court ordered Sczube-lek to appear for a hearing on the alleged violation. After briefing and a hearing, the court found that the DNA Act’s requirement that Sczubelek “submit to a DNA sampling does not violate his Fourth Amendment right against unreasonable searches and seizures.” United States v. Sczubelek, 255 F.Supp.2d 315, 317 (D.Del.2003). The court also held that the DNA Act did not violate either the separation of powers doctrine or the ex post facto clause of the United States Constitution. Id. at 324. The court ordered Sczubelek to report by May 9, 2003, to a phlebotomist to have his blood taken.
Sczubelek filed his notice of appeal on April 14, 2003. On April 15, he moved the District Court to stay its order pending this appeal. In support of his motion to stay, Sczubelek asserted that if he were to “be required to submit to the taking of his blood for the purposes of obtaining a DNA sample prior to the resolution of his appeal, it would moot the issues raised in his appeal.” On April 16, the District Court issued an order granting the stay. The next day, the government filed its opposition to Sczubelek’s request for a stay, arguing that Sczubelek could petition the court to have his DNA information ex[178]*178punged from CODIS in the event he prevailed on appeal.
On October 5, 2003, Sczubelek’s term of supervised release ended. The United States Probation Office for the District of Delaware sent Sczubelek a letter notifying him that his term of supervised release had been terminated and that he had satisfied all terms and conditions of his supervised release. On January 26, 2004, Sczu-belek filed a motion to dismiss his appeal, asserting that the case is now moot because he is no longer on supervised release.
II. JURISDICTION AND STANDARD OF REVIEW
The District Court had jurisdiction pursuant to 18 U.S.C. § 3231. We have jurisdiction pursuant to 28 U.S.C. § 1291.
We exercise plenary review over jurisdictional issues, including whether this case is moot. See Belitskus v. Pizzingrilli, 343 F.3d 632, 639 (3d Cir.2003). We also exercise plenary review over the District Court’s resolution of the constitutional issues Sczubelek raises in his appeal. United States v. Ledesma-Cuesta, 347 F.3d 527, 530 (3d Cir.2003).
IV. DISCUSSION
A. Mootness
Sczubelek argues that his appeal is moot because, even if the government prevails, the District Court no longer has jurisdiction over him to collect a DNA sample. In view of the fact that the DNA Act authorizes the collection of a DNA sample only from prisoners, parolees, and individuals on probation and supervised release and Sczubelek is no longer on supervised release, he asserts that the government has no authority under the DNA Act to collect the sample from him. The government contends on the other hand that, pursuant to 18 U.S.C. § 3583(i), the District Court’s jurisdiction to enforce an order it entered during Sczubelek’s supervised release survives the expiration of his term of supervised release.
Under Article III, § 2, of the United States Constitution, we have the ability to entertain only cases and controversies. “Article III requires that an actual controversy exist through all stages of litigation, including appellate review.” United States v. Kissinger, 309 F.3d 179, 180 (3d Cir.2002). A case should be dismissed as moot where “developments occur during the course of adjudication that eliminate a plaintiffs personal stake in the outcome of a suit or prevent a court from being able to grant the requested relief....” Morris v. Nationalist Movement, 273 F.3d 527, 533 (3d Cir.2001).
Here, the “development” which raises the issue of mootness is Sczubelek’s discharge from supervised release. If the government no longer has the authority to collect a DNA sample from Sczubelek, there is no need to determine the constitutionality of taking that sample. We agree with the government, however, that, even though Sczubelek’s term of supervised release has expired, the District Court retains jurisdiction pursuant to 18 U.S.C. § 3583(i) to adjudicate a violation of his supervised release. Section 3583(i), entitled “Delayed revocation,” provides:
The power of a court to revoke a term of supervised release for violation of a condition of supervised release, and to order the defendant to serve a term of imprisonment ... extends beyond the expiration of the term of supervised release for any period reasonably necessary for the adjudication of matters arising before its expiration if, before its expiration, a warrant or summons has [179]*179been issued on the basis of an allegation of such a violation.
18 U.S.C. § 3583®.
Even though this is the first opportunity we have had to address this issue in the context of an individual on supervised release, we have addressed similar challenges in the context of parole and probation. See Franklin v. Fenton, 642 F.2d 760 (3d Cir.1980); United States v. Bazzano, 712 F.2d 826 (3d Cir.1983). In Franklin, we rejected the defendant’s argument that it was unlawful to execute a warrant after his parole ended. We noted that “[sjince the original warrant was issued within the petitioner’s original term, it could be executed thereafter.” 642 F.2d at 764. In Bazzano, we decided that as long as formal revocation proceedings begin within a defendant’s term of probation, a district court could revoke probation after the term expired. 712 F.2d 826, 835 (1983). We observed:
It is difficult to think of a reason why a court should arbitrarily lose jurisdiction at the end of the five-year statutory period when the alleged violation took place within the five-year period and the probationer was formally notified within that period that the Government would seek to revoke his probation.
Id.
In the context of supervised release, our sister courts of appeals have reached the same conclusion. Even before Congress added subsection (i) to § 3583 in 1994, the Courts of Appeals for the Fourth and Ninth Circuits held that, even if the term of supervised release had expired, a district court could hold a hearing and revoke the defendant’s supervised release as long as some formal revocation proceeding had begun within the term of supervised release — whether it be a warrant, summons, an order to show cause, or a petition charging a violation of supervised release. See United States v. Neville, 985 F.2d 992, 995-96 (9th Cir.1993) (reasoning that “[t]he logical inference is that Congress expected some time to pass between the time a supervised release violation is discovered and the time supervised release is actually revoked.”); United States v. Barton, 26 F.3d 490 (4th Cir.1994) (noting that “[i]f the district court were to lose jurisdiction upon the lapse of the term of supervised release, persons who violated the conditions of their release near the end of the supervisory period would be immune to revocation.”).
After Congress added subsection (i), the courts of appeals began explicitly relying on § 3583® in their decisions upholding district courts’ jurisdiction to revoke supervised release after terms had expired. See United States v. Morales, 45 F.3d 693, 701 (2d Cir.1995) (noting that “the most likely purpose of the amendment was to make absolutely clear Congress’ earlier intention that sentencing courts have the authority to hold hearings to revoke or extend supervised release after expiration of the original term if they issue a summons or warrant during the release period.”); United States v. Garrett, 253 F.3d 443, 449 (9th Cir.2001) (holding that “adjudication” “refers to the federal adjudication of the defendant’s supervised release violations,” and “the ‘reasonably necessary’ period of time ... encompasses delays attributable to a defendant’s incarceration on state charges.”); United States v. Naranjo, 259 F.3d 379, 383 (5th Cir.2001) (holding that subsection (i) “permits revocation based on any violation of a condition of supervised release occurring during the supervision term, even if not contained in a petition for revocation filed during that term, so long as a warrant or summons was issued during that term on the basis of an alleged violation.”); United States v. Hondras, 296 F.3d 601, 602 (7th Cir.2002) [180]*180(holding that subsection (i) allows a court to “revoke a defendant’s supervised release even after the term of release has ended, so long as a valid warrant or summons was issued before the end of the period on the basis of an allegation that the release violated the terms of his release.”).
We will follow this line of cases, and we conclude that, pursuant to 18 U.S.C. § 3583(i), the District Court retained jurisdiction here to adjudicate the DNA collection condition of Sczubelek’s supervised release after his term had ended because the summons for the violation was issued during the supervised release period and the delay between the expiration of the term of supervised release and the adjudication of the District Court’s DNA collection order has been reasonably necessary to determine the constitutionality of the order. See Garrett, 253 F.3d at 446. The probation office filed a “Petition on Probation and Supervised Release” on October 1, 2002, and the District Court issued a summons ordering Sczubelek to appear for a hearing, which was held on October 15, 2002, all while Sczubelek was on supervised release.
Sczubelek contends, however, that this last fact — the holding of the hearing during the period of supervised release distinguishes his case from the courts of appeals decisions cited above. The cited cases all involved hearings that were held after the terms of supervised release had expired. See Neville, 985 F.2d at 994 (hearing held 13 days after term expired); Barton, 26 F.3d at 491 (hearing held 17 days after term expired); Morales, 45 F.3d at 695 (hearing held approximately two months after term expired); Garrett, 253 F.3d at 445 (arrest warrant executed nine months after term expired and hearing held ten months after term expired); Naranjo, 259 F.3d at 381 (hearing held almost three years after term expired); Hondras, 296 F.3d at 602 (hearing held eight months after term expired). Sezube-lek, however, overlooks the plain language of § 3583(i) which requires that a warrant or summons issue before the expiration of the term of supervised release but makes no mention of when the hearing on the violation must take place. We find no requirement — explicit or implied — in the statutory language which dictates that for § 3583(i) to come into effect, the hearing on the violation must be held after the expiration of the term of supervised release — indeed, such a requirement appears counterintuitive. See Bazzano, 712 F.2d at 835 (holding that where hearing on probation violation held during term of probation, District Court properly revoked term of probation after the term expired).
Sczubelek insists, however, that the District Court should have “stayed” the expiration of his term of supervised release, citing Rule 38 of the Federal Rule of Criminal Procedure. Rule 38 gives district courts the discretion to stay the commencement of a sentence of imprisonment, including a probation sentence, when the defendant chooses to appeal his sentence. It is possible that a defendant might file a motion pursuant to Rule 38 to delay the start of a term of imprisonment for a violation of supervised release while that violation was being appealed. In view of the language of § 3583(i), however, it is not necessary to invoke Rule 38 to maintain the jurisdiction of the district court to adjudicate a violation or to enforce the penalty for violation of supervised release. Because it is jurisdiction — not a delay in reporting for imprisonment — that is the issue before us, a stay of the expiration of supervised release was not necessary.
For the same reason, we find no merit in Sczubelek’s argument that the government and the District Court had to [181]*181have taken affirmative steps to extend his term of supervised release in order that the District Court might enforce its order if it was adjudicated to be constitutional. Moreover, a term of supervised release cannot be extended beyond its maximum authorized term. See 18 U.S.C. § 3583(e)(2). It is not evident from the record here whether the three year term of supervised release imposed on Sczube-lek was the maximum authorized. It is not necessary for us to make that determination, however, since jurisdiction over Sczubelek can be maintained under § 3583®.
We conclude, therefore, that under the provisions of § 3583®, because the summons for the DNA Act violation was issued during the term of supervised release, the District Court retained jurisdiction over Sczubelek to adjudicate that violation even after the expiration of the term of supervised release. Accordingly, Sczubelek’s appeal is not moot, and we will address the merits of his appeal.1
B. Fourth Amendment
In 1994, Congress passed the Violent Crime Control and Law Enforcement Act, 42 U.S.C. §§ 13701-14223 (1994) (Crime Control Act). The Crime Control Act authorized the Federal Bureau of Investigation to establish an index of DNA2 samples from individuals convicted of crimes, from crime scenes, and from unidentified human remains. 42 U.S.C. § 14132(a)(1). In response, the FBI created the Combined DNA Index System (CODIS). CO-DIS “allows State and local forensics laboratories to exchange and compare DNA profiles electronically in an attempt to link evidence from crime scenes for which there are no suspects to DNA samples of convicted offenders on file in the system.” H.R. Rep. 106-900(1), at 8 (2000).
The DNA Act requires individuals in custody and individuals on release, parole, or probation to give a DNA sample if they are, or have been, convicted of a qualifying federal offense. 42 U.S.C. §§ 14135a(a)(l), (2). Bank robbery, one of the offenses for which Sczubelek was on supervised release, is a qualifying federal offense. See id. § 14135a(d)(l)(E). With the passage of the DNA Act, Congress also amended the supervised release statute. The amendment requires the giving of a DNA sample as an explicit condition of supervised release. See 18 U.S.C. § 3583(d). In the case of an individual on supervised release, parole, or probation, the probation office responsible for the supervision of such individual must arrange for the collection of the DNA sample. See id. § 14135a(a)(2). The probation office “may use or authorize the use of such means as are reasonably necessary to detain, restrain, and collect a DNA sample” from any individual who refuses to give a sample. See . id. § 14135a(a)(4)(A). An individual who fails to give a DNA sample is guilty of a class A misdemeanor. See id. § 14135a(a)(5).
Once the collection facility obtains the DNA sample, it sends the completed test kit to the FBI laboratory for inclusion in CODIS. The DNA Act allows the DNA test results to be used only for purposes specified in the Crime Control Act. See 42 U.S.C. § 14135e(b). The Crime Control Act limits the disclosure of the test results to “criminal justice agencies for law enforcement identification purposes,” for use [182]*182“in judicial proceedings,” and “for criminal defense purposes, to a defendant.” See id. § 14132(b)(3). The DNA Act penalizes the disclosure of the sample or result to a person without authorization to receive it or the obtaining of a sample or result without authorization. See id. § 14135e(c). Furthermore, the Crime Control Act provides for the expungement of DNA records from CODIS when a conviction for a qualifying offense is overturned. See id. § 14132(d).
Sczubelek contends that the compelled extraction of his blood to obtain a DNA sample violates his Fourth Amendment right against unreasonable searches because it is a search executed without individualized suspicion of any criminal wrongdoing. The government concedes that the extraction of blood is a search, but argues that the search is constitutional under a traditional Fourth Amendment reasonableness analysis. The government argues alternatively that the search is reasonable under the special needs exception to the warrant requirement.
The Fourth Amendment to the United States Constitution provides that “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated.... ” Requiring Sczubelek to give a blood sample constitutes a Fourth Amendment search. Skinner v. Railway Labor Executives’ Ass’n, 489 U.S. 602, 616, 109 S.Ct. 1402, 103 L.Ed.2d 639 (1989) (“[TJhis physical intrusion, penetrating beneath the skin, infringes upon an expectation of privacy that society is prepared to recognize as reasonable.”). “The ensuing chemical analysis of the sample to obtain physiological data” is also a search covered by the Fourth Amendment. Id.
The fundamental task of any Fourth Amendment analysis is assessing the reasonableness of the government search. United States v. Knights, 534 U.S. 112, 118, 122 S.Ct. 587, 151 L.Ed.2d 497 (2001). If the search is reasonable, there is no constitutional problem, for the Fourth Amendment only protects individuals from unreasonable searches and seizures. Skinner, 489 U.S. at 619, 109 S.Ct. 1402. Determining whether a search is reasonable “ ‘depends on all of the circumstances surrounding the search or seizure and the nature of the search or seizure itself,’ ” Skinner, 489 U.S. at 619, 109 S.Ct. 1402 (citation omitted), and involves balancing “on the one hand, the degree to which [the search] intrudes upon an individual’s privacy and, on the other hand, the degree to which [the search] is needed for the promotion of legitimate governmental interests.” Knights, 534 U.S. at 119, 122 S.Ct. 587 (alteration in original).
A balance is usually struck by requiring that a warrant be based on probable cause. Skinner, 489 U.S. at 619, 109 S.Ct. 1402. However, “[n]either a warrant nor probable cause, nor, indeed any measure of individualized suspicion, is an indispensable component of reasonableness in every circumstance.” Nat’l Treasury Employees Union v. Von Raab, 489 U.S. 656, 665, 109 S.Ct. 1384, 103 L.Ed.2d 685 (1989). The Supreme Court has held that warrantless searches based on reasonable grounds can satisfy the Fourth Amendment’s reasonableness requirements in certain circumstances. In special needs cases, the Court has held that warrantless searches without any individualized suspicion withstand Fourth Amendment scrutiny.
Starting our analysis with the special needs exception, in Griffin v. Wisconsin, the Supreme Court held that a warrantless search of a probationer’s home, conducted entirely by a probation officer pursuant to [183]*183a state regulation that required probation searches to be based upon reasonable grounds, withstood Fourth Amendment scrutiny. 483 U.S. 868, 107 S.Ct. 3164, 97 L.Ed.2d 709 (1987). The Court reasoned that probation officers have a “special need” to supervise probationers, apart from a normal law enforcement need, that justifies a departure from the normal warrant and probable cause requirements. Id. at 873-74, 107 S.Ct. 3164. Probationers, the Court observed, do not enjoy the same liberties that ordinary citizens enjoy. Id. at 874, 107 S.Ct. 3164. The Court also noted that the goals of probation are to rehabilitate probationers — who are more likely to engage in criminal wrongdoing than ordinary citizens — and to protect the community from harm. Id. at 875-79, 107 S.Ct. 3164. Finally, the Court believed that imposing a warrant requirement for supervisory searches would significantly interfere with the goals of probation by reducing both the deterrent effect of the supervision and the ability of probation officials to act swiftly to protect the probationer from harming himself or others. Id. Griffin’s holding rested in part on the distinction between searches conducted by probation officers and investigative searches conducted by law enforcement officers. Id. at 879, 107 S.Ct. 3164 (“[W]e deal with a situation in which there is an ongoing supervisory relationship — and one that is not, or at least not entirely, adversarial — between the object of the search and the decisionmaker.”). The Court con-eluded that “its ‘special needs’ holding made it ‘unnecessary to consider whether’ warrantless searches of probationers were otherwise reasonable within the Fourth Amendment.” United States v. Knights, 534 U.S. 112, 117-18, 122 S.Ct. 587, 151 L.Ed.2d 497 (2001) (quoting Griffin, 483 U.S. at 880, 107 S.Ct. 3164).
The issue of a warrantless search of a probationer arose again in Knights. Here, however, the search was by the police in connection with the investigation of a crime, rather than a search by a probation officer performing his supervisory duties. The Court upheld the warrantless search of the probationer’s home by a police officer upon reasonable suspicion and based its decision, not on Griffin’s special needs holding, but on an examination of “‘the totality of the circumstances.’ ” 534 U.S. at 118, 122 S.Ct. 587 (quoting Ohio v. Robinette, 519 U.S. 33, 39, 117 S.Ct. 417, 136 L.Ed.2d 347 (1996)). The “salient circumstance” in'the Court’s view was the probation search condition, which the probationer knew about when he was placed on probation. Id. at 118, 122 S.Ct. 587. The Court concluded that the probationer had a “significantly diminished” expectation of privacy because he was informed of the search condition.3 Id. at 119-120, 122 S.Ct. 587. In considering the government’s interests, the Court found that “the recidivism rate of probationers is significantly higher than the general crime rate” and “probationers have even more of an incentive to conceal their criminal activities [184]*184and quickly dispose of incriminating evidence.” Id. at 120, 122 S.Ct. 587. Therefore, the Court concluded, the government’s “interest in apprehending violators of the criminal law, thereby protecting potential victims of criminal enterprise, may ... justifiably focus on probationers in a way that it does not on the ordinary citizen.” Id. at 121, 122 S.Ct. 587.
The courts of appeals that have addressed the constitutionality of the DNA Act or of similar state statutes, while unanimous in their decisions to uphold the statutes, are split as to whether to apply the Knights reasonableness standard or the Griffin special needs exception. The Fourth, Fifth and Ninth Circuit Courts of Appeals have utilized a reasonableness standard. See Jones v. Murray, 962 F.2d 302 (4th Cir.1992) (upholding Virginia DNA statute); Groceman v. United States, 354 F.3d 411 (5th Cir.2004) (relying on Knights to uphold the DNA Act); Rise v. Oregon, 59 F.3d 1556 (9th Cir.1995), and United States v. Kincade, 379 F.3d 813 (9th Cir.2004) (en banc, five judges endorsing the reasonableness standard; one, the special needs exception; and five dissenting). The Tenth Circuit Court of Appeals appears to be split. The court first analyzed the issue using a reasonableness analysis to uphold a Colorado DNA statute. See Boling v. Romer, 101 F.3d 1336 (10th Cir.1997) (principally citing Jones and Rise). However, more recently, and without substantive analysis, the court relied on the special needs doctrine to uphold the DNA Act. See United States v. Kimler, 335 F.3d 1132 (10th Cir.2003). The Second and Seventh Circuit Courts of Appeals have employed the special needs exception. See Roe v. Marcotte, 193 F.3d 72 (2d Cir.1999) (upholding Connecticut DNA statute); Green v. Berge, 354 F.3d 675 (7th Cir.2004) (upholding Wisconsin DNA statute). The District Court in this case upheld the constitutionality of the DNA Act under the special needs exception.
Because we conclude that the purpose for the collection of DNA goes well beyond the supervision by the Probation Office of an individual on supervised release, as was the situation in Griffin, we believe that it is appropriate to examine the reasonableness of the taking of the sample under the more rigorous Knights totality of the circumstances test rather than the Griffin special needs exception. We conclude that, under the totality of the circumstances, the taking of a DNA sample from an individual on supervised release is not an unreasonable search. We explain our reasons below.
First, the intrusion of a blood test is minimal. See Skinner, 489 U.S. at 625, 109 S.Ct. 1402 (blood tests are commonplace, safe, and “ ‘do not constitute an unduly extensive imposition on an individual’s privacy and bodily integrity.’ ”) (quoting Winston v. Lee, 470 U.S. 753, 762, 105 S.Ct. 1611, 84 L.Ed.2d 662 (1985)). While this slight intrusion into an ordinary citizen’s privacy is unconstitutional, individuals on supervised release, like individuals on probation, “do not enjoy the absolute liberty to which every citizen is entitled.” Knights, 534 U.S. at 119, 122 S.Ct. 587 (internal quotations and citations omitted).
Sczubelek, as an individual on supervised release, has a reduced right to privacy-and in particular to privacy of identity. When Sczubelek was arrested, he was photographed and his fingerprints were taken. After his conviction of a felony, his identity became a matter of compelling interest to the government, and these marks of identification, the fingerprints and the photographs, became a permanent record. Sczubelek can no longer assert a privacy interest in these means of identification. His DNA is a further-and in fact a more reliable-means of identification. See identification. See [185]*185Jones, 962 F.2d 302 (“[W]hen a suspect is arrested upon probable cause, his identification becomes a matter of legitimate state interest and he can hardly claim privacy in it.”); Groceman, 354 F.3d at 413-14 (“Though, like fingerprinting, collection of a DNA sample for purposes of identification implicates the Fourth Amendment, persons incarcerated after conviction retain no constitutional privacy against their correct identification.”); Rise, 59 F.3d at 1560 (convicted felons “do not have the same expectations of privacy in their identifying genetic information.”). Individuals on supervised release cannot reasonably expect to keep information bearing on their physical identity from government records. Thus, for criminal offenders the privacy interests implicated by the collection of DNA are minimal.4 Moreover, we agree with the government that it has a compelling interest in the collection of identifying information of criminal offenders. A DNA database promotes increased accuracy in the investigation and prosecution of criminal cases. It will aid in solving crimes when they occur in the future. Equally important, the DNA samples will help to exculpate individuals who are serving sentences of imprisonment for crimes they did not commit and will help to eliminate individuals from suspect lists when crimes occur.5 While the presence of Sczubelek’s DNA in COD IS may inculpate him in the future, it may also exonerate him. The interest in accurate criminal investigations and prosecutions is a compelling interest that the DNA Act can reasonably be said to advance. The court in Jones explained:
It is a well recognized aspect of criminal conduct that the perpetrator will take unusual steps to conceal not only his conduct, but also his identity. Disguises used while committing a crime may be supplemented or replaced by changed names, and even changed physical features. Traditional methods of identification by photographs, historical records, and fingerprints often prove inadequate. The DNA, however, is claimed to be unique to each individual and cannot, within current scientific knowledge, be altered. The individuality of the DNA provides a dramatic new tool for the law enforcement effort to match suspects and criminal conduct. Even a suspect with altered physical features cannot escape the match that his DNA might make with a sample contained in a DNA bank, or left at the scene of a crime within samples of blood, skin, semen or hair follicles. The governmental justification for this form of identification, therefore, relies on no [186]*186argument different in kind from that traditionally advanced for taking fingerprints and photographs, but with additional force because of the potentially greater precision of DNA sampling and matching methods.
962 F.2d at 307.
An additional government interest is promotion of “the two primary goals of probation — rehabilitation and protecting society from future criminal violations.” Knights, 534 U.S. at 119, 122 S.Ct. 587. As with individuals on probation, individuals on supervised release are associated with higher recidivism rates. See Griffin, 483 U.S. at 880, 107 S.Ct. 3164 (probationers are “in need of rehabilitation and [are] more likely than the ordinary citizen to violate the law.”); see also Knights, 534 U.S. at 120, 122 S.Ct. 587 (“The recidivism rate of probationers is significantly higher than the general crime rate.”). Individuals on supervised release, just as probationers, no doubt would like to keep their identifying information hidden from public access:
[Probationers have even more of an incentive to conceal their criminal activities and quickly dispose of incriminating evidence than the ordinary criminal because probationers are aware that they may be subject to supervision and face revocation of probation, and possible incarceration, in proceedings in which trial rights of a jury and proof beyond a reasonable doubt, among other things, do not apply....
Knights, 534 U.S. at 120, 122 S.Ct. 587. Moreover, collection of identifying information will indirectly promote the rehabilitation of criminal offenders by deterring them from committing crimes in the future.
Furthermore, the collection of DNA samples will protect society. A recent Attorney General report prepared for Congress indicates that at least seven deaths, 89 rapes, 14 rape/deaths, nine sexual assaults, 14 robberies, three assaults, one burglary, and several property crimes could have been prevented had a DNA sample been taken earlier. National Forensic DNA Study Report at 49-66 (December 12, 2003).
Sczubelek argues, however, that the Supreme Court’s decision in Knights requires us to find the DNA Act unconstitutional because it requires the submission of a DNA sample without individualized suspicion of criminal wrongdoing. Knights, however, does not establish the constitutional floor below which searches are unconstitutional. The Court made clear that it was not deciding “whether the probation condition so diminished, or completely eliminated, ... [the probationer’s] reasonable expectation of privacy ... that a search by a law enforcement officer without any individualized suspicion would have satisfied the reasonableness requirement of the Fourth Amendment.” Knights at 120, n. 6, 122 S.Ct. 587 (emphasis added). We conclude, therefore, that the Knights totality of the circumstances test would permit a finding that the DNA Act, mandating collection of DNA from a criminal offender without individualized suspicion, complies with the Fourth Amendment’s reasonableness requirements. In reaching this decision, we find support in the Court’s holding in Skinner v. Railway Labor Executives’ Assoc.:
[A] showing of individualized suspicion is not a constitutional floor, below which a search must be presumed unreasonable .... In limited circumstances, where the privacy interests implicated by the search are minimal, and where an important governmental interest furthered by the intrusion would be placed in jeopardy by a requirement of individualized suspicion, a search may be rea[187]*187sonable despite the absence of such suspicion.
489 U.S. 602, 624, 109 S.Ct. 1402, 103 L.Ed.2d 639 (1989). This is one of those circumstances. As with fingerprinting, the Fourth Amendment does not require additional individualized suspicion in order to take a blood sample from a criminal offender such as Sczubelek.
Moreover, there are other factors, in addition to the insignificance of the intrusion, Sezubelek’s reduced expectation of privacy, and the Government’s compelling interests, which convince us that the DNA Act authorizes a search that meets the reasonableness requirements of the Fourth Amendment. First, there is no discretion on the part of probation officers as to who is required to give a DNA sample. The DNA Act clearly delineates the offenses for which a sample must be taken and from whom the sample must be taken. See 42 U.S.C. § 14135a(a)(l), (2). Only the Bureau of Prisons and the Probation Office have the authority to take the sample. See id. This limited discretion helps to alleviate concerns over probable cause and individualized suspicion. The permissible uses authorized by the DNA Act are similarly specified. The sample must be forwarded for entry into CODIS and may only be used for law enforcement identification purposes, in judicial proceedings, and for criminal defense purposes. See id. § 14135e(b); 42 U.S.C. § 14132(b)(3). The DNA Act also punishes the unauthorized disbursement or obtaining of DNA samples. See 42 U.S.C. § 14135e(c). Finally, the Act provides for expungement of the DNA information from CODIS upon reversal or dismissal of conviction. See id. § 14132(d).
In view of the importance of the public interests in the collection of DNA samples from criminal offenders for entry into a national DNA database and the degree to which the DNA Act serves to meet those interests, balanced against the minimal intrusion occasioned by giving a blood sample and the reduced privacy expectations of individuals on supervised release, we conclude that the collection of DNA samples from individuals on supervised release, pursuant to the DNA Act, is not an unreasonable search in violation of the Fourth Amendment.
C. Separation of Powers
Sczubelek also argues that the DNA Act violates the separation of powers doctrine because it turns probation officers into “adjunct law enforcement officers” by mandating that they seize DNA samples by force if necessary. Sczubelek claims that the DNA Act requires the U.S. Probation Office to exceed its role as a neutral arm of the judiciary by adding adversarial and law enforcement aspects to the supervisory role it already holds.
The District Court rejected Sezubelek’s separation of powers challenge, reasoning that a probation officer’s duties, which include supervising the probationer to assure compliance with conditions, taking urine samples to screen for drug use, and reporting violations of conditions to the court, have a law enforcement aspect that is “a result of the practical function of governing that ‘mandates some overlap of responsibility and interdependence among the branches.’ ” Sczubelek, 255 F.Supp.2d at 324 (quoting Mistretta v. United States, 488 U.S. 361, 381, 109 S.Ct. 647, 102 L.Ed.2d 714 (1989)).
While “the separation of governmental power into three coordinate branches is essential to the preservation of liberty,” Mistretta, 488 U.S. at 380, 109 S.Ct. 647, the Supreme Court has advised that the separation of powers doctrine does not support “the notion that the three Branches must be entirely separate.” Id. Some [188]*188convergence of the branches, interdependence, and flexibility are necessary in order for our country to govern itself effectively. Id. at 381.
Law enforcement is an executive function, and probation officers serve a supervisory function for the judicial branch. See United States v. Bermudez-Plaza, 221 F.3d 231, 234 (1st Cir.2000) (“In reporting suspected violations, and even in recommending a particular course of action, the probation officer is simply performing her statutory duty to assist the court in its supervision of individuals on supervised release, which supervision is an integral part of the courts’ quintessentially judicial sentencing responsibility.”); see also 18 U.S.C. § 3603 (requiring probation officers to supervise probationers, report to the Administrative Office of the United States Courts, and report violations to the court). In Mistretta, the Supreme Court recognized the creation of “the Administrative Office of the United States Courts whose myriad responsibilities include the administration of the entire probation service.” 488 U.S. at 389-90, 109 S.Ct. 647. The courts of appeals have rejected various separation of powers challenges to actions of probations officers, including their role in initiating the revocation of supervised release and recommending a course of action to the court, Bermudez-Plaza, 221 F.3d at 234-35; United States v. Amatel, 346 F.3d 278, 279-80 (2d Cir.2003); United States v. Mejia-Sanchez, 172 F.3d 1172, 1176 (9th Cir.1999); United States v. Davis, 151 F.3d 1304, 1306-08 (10th Cir.1998), and their role in the preparation of presentence reports, United States v. Washington, 146 F.3d 219, 223 (4th Cir.1998); United States v. Woods, 907 F.2d 1540, 1543-44 (5th Cir.1990); United States v. Belgard, 894 F.2d 1092, 1096-99 (9th Cir.1990).
The collection of DNA samples does not transform probation officers into “adjunct law enforcement officers.”6 The probation officers are charged by statute with organizing the collection of DNA samples and submission of DNA test kits to the FBI laboratory. The probation officers have no involvement in either analyzing the samples, entering the samples into CO-DIS, or investigating crimes. Furthermore, law enforcement agencies are not involved with the actual search itself. It is only after the testing facility turns over the test kits to the FBI that law enforcement involvement begins.
Sczubelek argues that the probation office’s collection of DNA samples does not serve a probationary purpose but instead serves a law enforcement purpose. Indeed, it does serve a law enforcement purpose because the DNA samples are turned over to the FBI for use in solving crimes. Giving probation officers the authority to “detain” and “restrain” in order to collect DNA, see 42 U.S.C. § 14135a(a)(40)(A), also adds an element of law enforcement, but this authority is similar to the authority granted by 18 U.S.C. § 3606 to probation officers to arrest probationers for violations of probation. That arrest power has never been successfully challenged. See, e.g., United States v. Amatel, 346 F.3d 278, 278-79 (2d Cir.2003).
Despite the law enforcement aspects of the U.S. Probation Office’s role in the collection of DNA samples, we conclude that [189]*189the collection of DNA samples falls within the office’s supervisory function. As discussed above, the two primary goals of supervised release are rehabilitation and the prevention of harm to others. The condition of giving a DNA sample furthers both goals. A probation officer’s collection of DNA samples is as conducive to the officer’s supervisory function as the other conditions of supervised release aimed at preventing offenders from using drugs, from hurting themselves, or from hurting others.
Moreover, even if collecting DNA samples were beyond the probation office’s supervisory function — and we do not believe that it is — it does not necessarily follow that there is a separation of powers violation. There would also have to be an encroachment on the Executive Branch, and that encroachment is missing here. Giving probation officers the power to collect DNA samples does not interfere with the Executive Branch’s ability to make law enforcement decisions and perform law enforcement functions. Probation officers play no part in how the DNA information is used after the test kits are sent to the FBI. “[TJhere is no possibility that ... [allowing probation officers to collect DNA samples] will curtail the scope of the official powers of the Executive Branch.” Clinton v. Jones, 520 U.S. 681, 701, 117 S.Ct. 1636, 137 L.Ed.2d 945 (1997).
Finally, giving probation officers the power to collect DNA samples does not compromise the integrity of the Judicial Branch. Probation officers have no discretion in the matter — they must coordinate the collection of DNA samples from every parolee, probationer, or individual on supervised release who is, or has been, convicted of a qualifying federal offense. 42 U.S.C. § 14135a(a)(1), (2). If this condition is violated, the probation officer must report the violation to the court, and the court remains the final arbiter. Finally, the collection of DNA samples is not a task that is “more properly accomplished by [other] branches.” Mistretta, 488 U.S. at 383, 109 S.Ct. 647 (quoting Morrison v. Olson, 487 U.S. 654, 680-81, 108 S.Ct. 2597, 101 L.Ed.2d 569 (1988)).
We will affirm the District Court’s rejection of Sczubelek’s separation of powers challenge to the DNA Act.
V. CONCLUSION
For the reasons stated above, we will affirm the District Court’s order requiring Sczubelek to report to a phlebotomist and give a DNA sample, and we will remand this case to the District Court for further proceedings consistent with this opinion.