The district court found Defendant-Appellant Kyulle Jay Strong incompetent to stand trial and committed him to the custody of the Attorney General for treatment and restoration pursuant to 18 U.S.C. § 4241(d). Strong appeals the district court’s commitment order, arguing that § 4241(d) is unconstitutional because it requires mandatory confinement without giv: ing the district court an opportunity to assess a defendant’s individualized circumstances. We conclude that § 4241(d) comports with the Due Process Clause of the Constitution and affirm the commitment order of the district court.
I. BACKGROUND
On November 9, 2005, a grand jury in the District of Arizona indicted Strong and two co-defendants for assault "with a dangerous weapon in violation of 18 U.S.C. §§ 1153 and 113(a)(3), and assault resulting in serious bodily injury in violation of 18 U.S.C. §§ 1153 and 113(a)(6). 1 Before trial, Strong filed a motion with the district court for determination of his mental competency. After reviewing psychiatric reports submitted by Strong and the government, the district court concluded that Strong was incompetent to stand trial and committed him to the custody of the Attorney General for treatment and restoration pursuant to 18 U.S.C. § 4241(d). 2 Strong argued before the district court that commitment under § 4241(d) violated his due process rights, because the statutory provision required mandatory commitment and did not give the district court an opportunity to assess Strong’s individualized circumstances, such as whether Strong is, in fact, restorable to competency, and *1058 whether inpatient treatment is the least restrictive means to restore him. The district court rejected Strong’s argument and held § 4241(d) to be constitutional. Accordingly, it ordered Strong transferred to a federal medical facility in Butner, North Carolina, under the terms of that statutory provision. Strong timely appealed the district court’s commitment order, renewing his argument that § 4241(d) is unconstitutional.
While awaiting transfer, the district court permitted Strong to remain at Recovery Homes, a local inpatient facility where Strong had been residing while receiving drug and alcohol treatment. When Strong was initially granted pre-trial release, the district court warned him and defense counsel that Strong’s release to Recovery Homes would be contingent upon Strong’s strict adherence to his pretrial release conditions. Specifically, the district court emphasized to defense counsel:
Mr. Strong will have to sign the release order, but I want him to do that only, only after you have reviewed it thoroughly with him, reviewed the nature of the charges against him, and made sure in your own mind ... that he is fully aware of the consequences of his violation of the slightest degree of anything in this release order.
Because Strong undisputedly had an alcohol and substance abuse problem, one of the conditions of his pre-trial release was that he refrain from the consumption of alcohol.
Before this court heard Strong’s appeal of the § 4241(d) commitment order, Strong violated a condition of his pre-trial release by consuming a beer. Consequently, he was terminated from the treatment program at Recovery Homes and brought before the district court for pre-trial release revocation proceedings. At the revocation hearing, the district court concluded that Strong’s violation of the pre-trial release condition “represent[ed] the wors[t] type of conduct that the Court can imagine taking into consideration the nature of the charges.” It therefore ordered Strong detained as a danger to the community pursuant to 18 U.S.C. § 3142. 3 Before the district court issued the detention order, defense counsel urged the district court not to consider its prior commitment order in deciding whether or not to detain Strong. Although it is not entirely clear from the record, it does not appear that the district court heeded defense counsel’s request. As will be discussed in more detail below, when asked specifically by defense counsel whether its decision to detain Strong was influenced by Strong’s impending commitment under § 4241(d), the district court answered in the affirmative.
Strong timely appealed the § 3142 detention order, which this court affirmed. United States v. Strong, No. 06-10609 (9th Cir. Dec. 11, 2006) (unpublished order) (Goodwin, McKeown, Fisher, JJ.). In light of the detention order, the government filed a motion to dismiss Strong’s § 4241(d) appeal on mootness grounds. On December 18, 2006, this court denied the government’s motion without prejudice “to renewing the arguments in the answering brief.” United States v. Strong, No. 06-10566 (9th Cir. Dec. 18, 2006) (unpublished order) (McKeown, Fisher, JJ.). The government renewed its mootness argument in the present appeal.
*1059
The issue before us is the validity of the district court’s September 13, 2006 commitment order. We have jurisdiction under the “collateral order” doctrine.
See United States v. Friedman,
II. MOOTNESS
Mootness is a jurisdictional issue which we address at the threshold.
See Foster v. Carson,
An appeal is moot “when, by virtue of an intervening event, a court of appeals cannot grant any effectual relief whatever in favor of the appellant.”
Calderon v. Moore,
We agree with the government’s argument in principle, but disagree that the argument should be applied in the specific context of this case. The government has failed to carry its “heavy burden” of persuading us that, even in the absence of the § 4241(d) commitment order, the district court would nevertheless have adjudged Strong to be a danger to the community and detained him pursuant to § 3142.
See GATX/Airlog Co.,
Well, yes, the Court did take into consideration the commitment. And it, in the Court’s mind, justifies the precise language of the statute that requires a mandatory commitment to the custody of the attorney general for the obvious reason that you can’t have people who are found by the court to be incompetent and have them loose in the society.
If the district court had answered defense counsel’s question with a “no,” then we could conclude that the commitment order before us now had been overtaken *1060 by subsequent events, rendering this appeal moot. But that was not the answer the district court gave when asked the critical question. Instead, the court said that its decision to detain Strong was based, at least in part, on Strong’s impending commitment under § 4241(d). Accordingly, we cannot say with certainty that the district court might not issue a different order if we were to remand the matter after holding the mandatory confinement provision of § 4241(d) to be unconstitutional.
In prior cases, we have held that where the district court has the statutory discretion to modify a defendant’s term of supervised release following a successful sentencing challenge, the possibility that the district court may exercise such discretion following this court’s decision is sufficient to prevent an appeal from becoming moot.
See Mujahid v. Daniels,
III. THE COMMITMENT ORDER
Strong argues that 18 U.S.C. § 4241(d) violates his liberty interest under the Due Process Clause to be
free
from government confinement, because the statutory provision “mandates institutionalization of all incompetent criminal defendants for restoration without any consideration of the efficacy of such a commitment or the availability of less restrictive alternatives.”
4
See Reno v. Flores,
Whether mandatory commitment under § 4241(d) violates a defendant’s fundamental liberty interest under the Due Process Clause is an issue of first impression for this court. We look, first and foremost, to the Supreme Court’s decision in
Jackson v. Indiana,
In
Jackson,
the Supreme Court reviewed the constitutionality of an Indiana statutory scheme that provided for the commitment of criminal defendants adjudged to be incompetent to stand trial.
See
Second, the Court concluded that the indefinite term of the commitment prescribed under the statute did not bear a “reasonable relation” to the purported purpose for which the commitment was designed — specifically, the purpose of determining whether a defendant was restora-ble to competency.
See id.
at 738,
Our examination of § 4241(d) convinces us that the statute before us is fundamentally different from the statutory scheme invalidated in
Jackson.
In fact, it is significant to note that § 4241(d) was enacted in response to the
Jackson
decision and echoed
Jackson’s
language.
See, e.g., United States v. Donofrio,
Unlike the statute at issue in Jackson, the duration of the commitment authorized under § 4241(d) is inherently limited. The relevant portion of the statute provides that, upon a finding of incompetency:
[T]he Court shall commit the defendant to the custody of the Attorney General ... [who] shall hospitalize the defendant *1062 for treatment in a suitable facility ... for suck a reasonable period of time, not to exceed four months, as is necessary to determine whether there is a substantial probability that in the foreseeable future he will attain the capacity to permit the proceedings to go forward.
18 U.S.C. § 4241(d) (emphasis added). By its own terms, § 4241(d) caps a criminal defendant’s initial commitment for incompetency to a period of no more than four months. Id. § 4241(d)(1). The statute also provides a flexible mechanism through which the defendant could gain early release — namely, through regaining competency prior to the conclusion of the four-month period, or through an appropriate medical determination that there is no “substantial probability” that the defendant could be restored to competency in the “foreseeable future.” Id. Strong’s counsel readily acknowledged the flexible nature of § 4241(d) during district court proceedings, noting at one point: “[O]nce [Strong] gets to Butner ... the staff there might say within a week that he’s competent or that he’s not restorable. That’s unlikely, but in theory, and he would be returned to us. And we would be on the trial track again.” (emphasis added).
Also contrary to the statutory scheme invalidated in Jackson, commitment under § 4241(d) bears a “reasonable relation” to the purpose for which it is designed: determining whether a criminal defendant is susceptible to timely restoration. See 18 U.S.C. § 4241(d)(1). Strong disagrees, arguing that no such reasonable relationship exists because § 4241(d) provides for the commitment of restorable and non-restora-ble defendants alike. We reject Strong’s argument as being grounded on a faulty premise.
As a number of other circuit courts have noted, the overarching purpose of commitment under § 4241(d) is to enable medical professionals to accurately determine whether a criminal defendant is restorable to mental competency. Such a determination requires a more “careful and accurate diagnosis” than the “brief interviews” and “review of medical records” that tend to characterize the initial competency proceeding.
See United States v. Ferro,
Strong also argues that the Supreme Court’s decision in
Demore v. Kim,
IV. CONCLUSION
Three other circuits have considered the issue of whether § 4241(d) is consistent with the Due Process Clause and have uniformly answered this question in the affirmative.
See Filippi,
AFFIRMED.
Notes
. Federal jurisdiction is appropriate because the charged offenses occurred within the confines of an Indian Reservation.
. 18 U.S.C. § 4241(d) provides, in pertinent part:
If, after [a competency] hearing, the court finds by a preponderance of the evidence that the defendant is presently suffering from a mental disease or defect rendering him mentally incompetent to the extent that he is unable to understand the nature and consequences of the proceedings . against him or to assist properly in his defense, the court shall commit the defendant to the custody of the Attorney General. The Attorney General shall hospitalize the defendant for treatment in a suitable facility—
(1) for such a reasonable period of time, not to exceed four months, as is necessary to determine whether there is a substantial probability that in the foreseeable future he will attain the capacity to permit the proceedings to go forward; and
(2) for an additional reasonable period of time until—
(A) his mental condition is so improved that trial may proceed, if the court finds that there is a substantial probability that within such additional period of time he will attain the capacity to permit the proceedings to go forward; or
(B) the pending charges against him are disposed of according to law;
whichever is earlier.
. 18 U.S.C. § 3142 sets forth the criteria for determining whether a criminal defendant should be detained or released pending trial.
. In a footnote to his opening brief, and without citation to the relevant authority, Strong also argues that § 4241(d) violates the Equal Protection Clause, as well as 29 U.S.C. § 794. "The summary mention of an issue in a footnote, without reasoning in support of the appellant’s argument, is insufficient to raise the issue on appeal.”
Hilao v. Estate of Marcos,
