OPINION
TIPTON, Judge.
The defendant, Dwayne Willard Phillips, appeals as of right from the order of the Knox County Criminal Court requiring his hospitalization for a minimum of sixty days in a mental health facility pursuant to T.C.A. § 33-7-303(a) for the purpose of diagnosis and evaluation after he was found not guilty by reason of insanity. The defendant contends that his mandatory hospitalization pursuant to T.C.A. § 33-7-303(a) violates equal protection and due process. We disagree.
The defendant was charged with aggravated robbery, three counts of aggravated kidnapping, and two counts of especially aggravated kidnapping. He entered a plea of not guilty by reason of insanity. At his bench trial, the defendant stipulated the facts giving rise to the charges. On December 5, 1990, the defendant entered a branch of the First Tennessee Bank and forced several tellers at gunpoint to give him money. He then forced the branch manager to accompany him to a ear and demanded that she get in. However, when a dye pack among the stolen money exploded, the manager was able to escape. Later, the defendant was arrested after leading the police on a chase, wrecking his car and attempting to escape on foot. Approximately twelve thousand dollars in cash was retrieved.
The remaining proof consisted of the testimony of Dr. Clifton R. Tennison, a psychiatrist, and Robert Wyriek, a licensed clinical social worker. Dr. Tennison testified that as the medical director at Helen Ross McNabb Center, he conducted a court-ordered examination of the defendant on October 31, 1991, and that another Center psychiatrist conducted an examination on November 8,1991. He said that several “forensic team conferences” were held regarding the defendant [876]*876and that they concluded that a defense of insanity could be supported. Dr. Tennison stated that in his opinion within a reasonable degree of medical certainty, the defendant was suffering from major depression with psychotic features at the time of the crime, characterized by grandiose and paranoid delusions. Essentially, he believed that the defendant could appreciate that his conduct was wrong at the time it occurred, but was substantially deprived of the ability to conform his conduct to the requirements of the law.
Dr. Tennison testified that he had reviewed Mr. Wyrick’s records of the defendant’s treatment and stated that he believed that the defendant had made remarkable progress during psychotherapy. Dr. Tenni-son stated that the defendant was not a danger to society, but needed to continue in therapy. He indicated that he believed that mandatory hospitalization would be counterproductive to the defendant’s mental health status, asserting that the outpatient psychotherapy had been directly responsible for the defendant’s return to functioning in society. However, when asked whether the defendant’s depression was recurrent or not, Dr. Tennison admitted that he did not make that determination and indicated that it would entail “a lot more evaluation to find out his remote psychiatric history.” He noted that the defendant had been in therapy with Mr. Wyriek at least once before the incident.
Mr. Wyriek testified that he was employed with Ridgeview Hospital for some twenty-eight years as a psychotherapist. He stated that about a month after the incident, the defendant began therapy with him and that the defendant remained in treatment through the time of the trial, being seen weekly. He said that he believed that the defendant was not a danger to society and that hospitalization would pose added stress, being counterproductive although not “disastrous.” He acknowledged, though, that continued treatment was necessary indefinitely, although a point will arrive at which maximum gain will have been reached.
The trial court found the defendant to be not guilty by reason of insanity. It concluded that the requirement under T.C.A. § 33-7-303(a) of immediate hospitalization of a person acquitted of a crime by reason of insanity was constitutional. However, it found that the defendant was no longer a danger to society at the time of the trial and that immediate hospitalization could result in irreparable harm to the defendant in light of his progress since the time of the incident. Thus, it stayed the defendant’s hospitalization pending the disposition of this .appeal, conditioned upon the defendant remaining in psychotherapy and maintaining his employment.
I
Preliminarily, we note that the defendant has candidly acknowledged a question about our jurisdiction in this case, a threshold determination that we are obligated to make in every case. See T.R.A.P. 13(b). The state has not raised a similar question in this court.
First, a question existed at the time of the appeal about whether the Tennessee Court of Criminal Appeals could take jurisdiction in a ease in which the only issue was the constitutionality of a state statute. At that time, T.C.A. § 16-5-108(e) (Supp.1993), expressly barred our assumption of jurisdiction in such a case. However, early in this appeal, the legislature deleted subsection (c) from T.C.A. § 16-6-108 so as to give us authority to decide this case. See 1994 Tenn.Public Acts, ch. 609, § 1.
Second, a question may exist about whether the trial court’s ordering the defendant to be hospitalized, as mandated by T.C.A. § 33-7-303(a), falls within our jurisdiction. Obviously, the order follows an acquittal and is not a “final judgment” in a criminal case. However, it necessarily occurs within a case or proceeding “instituted with reference to or arising out of a criminal ease” for which we are specifically invested with review authority. T.C.A. § 16-5-108(a)(2).
Also, we note that after the statutory period of evaluation, an insanity aequittee is entitled to a hearing in the original trial court to determine if commitment or further treatment is warranted and that appellate review [877]*877of that determination is by our court. See T.C.A. § 33-7-303(b)(l) and (d). Given these circumstances, it is only practical to assume that we have jurisdiction, as well, to review the trial court’s initial hospitalization order.
We must note, though, that the fact that we have authority over this ease and the constitutional issue raised does not necessarily mean that the defendant has properly appealed the ease. The record reflects that the defendant filed a notice of appeal and has otherwise conducted this ease as an appeal as of right pursuant to Rule 3(b), T.R.A.P. However, nothing in Rule 3(b) provides for an appeal as of right from a post-acquittal order in a criminal ease. In this respect, we recognize that in State v. McCary, 815 S.W.2d 220 (Tenn.Crim.App.1991), this court accepted an appeal as of right from a trial court’s refusal to expunge public records of dismissed charges even though the appeal was not expressly authorized by Rule 3(b). In doing so, it viewed the omission of such an action from the appellate rules to be an oversight because “the statute establishing jurisdiction in this Court apparently anticipates that all final judgments arising out of criminal cases are appealable.” 815 S.W.2d at 221.
We are not so confident, though, that McCary’s result should control in the present case. The initial hospitalization order is essentially in the nature of an interlocutory order in that the matter is required by statute to be returned to the trial court to determine whether, at least, future outpatient treatment is warranted. See T.C.A. § 33-7-303(b)(1). In fact, with the initial order being one imposed solely by statutory mandate, leaving nothing to the discretion of the trial court until the matter is returned to the court, we do not view the initial order to be a final judgment order that would allow an appeal as of right. In this respect, the provision in T.C.A. § 33-7-303(d) for an appeal to this court of a “final adjudication” can only be a reference, in context, to the trial court’s ultimate discretionary action. Therefore, we conclude that appellate review of a trial court’s initial hospitalization order for an insanity acquittee under T.C.A. § 33-7-303(a) should have been invoked through a discretionary appeal pursuant to either Rule 9 or Rule 10, T.R.A.P.1 However, given the lack of objection by the state and the fact that we believe we have jurisdiction to act in this case, we believe that good cause exists for us to suspend the appellate rules in order that the case may be resolved upon its merits. See T.R.A.P. 2.
II
The defendant contends that T.C.A. § 33-7-303(a) violates his due process and equal protection rights because it does not allow the trial court to exercise any discretion as to whether an insanity acquittee must undergo the sixty to ninety day hospitalization for diagnosis and evaluation. The defendant argues that he has proven that he was neither mentally ill nor dangerous at the time of acquittal. He maintains that the legislature enacted the mandatory hospitalization provision in order to prevent potentially dangerous insanity acquittees from being released without first undergoing some type of mental evaluation. He contends that he is different from most insanity acquittees because he voluntarily began psychiatric treatment at the time of the commission of the offense, as opposed merely to undergoing a mental evaluation for trial purposes. The defendant asserts that it would violate his due process and equal protection rights if the state held him for evaluation when he has demonstrated his present sanity and lack of dangerousness.
In order to put the defendant’s arguments into context, we should explain how Tennessee dealt with the issue of insanity at the time of the defendant’s trial. Although the law presumes the sanity of one accused of a crime, State v. Overbay, 874 S.W.2d 645, 650 (Tenn.Crim.App.1993), insanity at the time of the offense was “a defense to prosecution if, ... as a result of mental disease or defect, [878]*878the person lacked the substantial capacity either to appreciate the 'wrongfulness of the person’s conduct or to conform that conduct to the requirements of the law.” T.C.A. § 39-11-501(a) [amended 1995].2 Although sanity was presumed, if the evidence presented by either the defendant or the state raised a reasonable doubt as to the defendant’s sanity, the state had the burden of proving the defendant’s sanity beyond a reasonable doubt. See Collins v. State, 506 S.W.2d 179, 183-84 (Tenn.Crim.App.1973); Graham v. State, 547 S.W.2d 531, 544 (Tenn.1977). In this fashion, a verdict of not guilty by reason of insanity means that, at least, some evidence of insanity existed and a reasonable doubt was found to exist with regard to sanity at the time of the alleged offense.
In Graham, 547 S.W.2d at 544, our supreme court recommended that the legislature correct “a deficiency in Tennessee law relating to the disposition of a criminal defendant found not guilty by reason of insanity.” Under T.C.A. § 33-709, the district attorney had the option of seeking hospitalization of an insanity aequittee if he determined that it was justified. The supreme court stated that the trial court should have the authority to commit an insanity aequit-tee, instead of leaving such a decision to the district attorney’s discretion. Graham, 547 S.W.2d at 544. The legislature subsequently amended the statute, 1977 Tenn.Pub.Acts, eh. 396, and imposed the requirement that all insanity acquittees be detained for sixty to ninety days for diagnosis and evaluation. The supreme court stated that the “new legislation should significantly reduce the risk that persons acquitted by reason of insanity will be prematurely released, or released without mandatory out-patient treatment.” State v. Clayton, 656 S.W.2d 344, 353 (Tenn.1983).
Under T.C.A. § 33-7-303(a), the trial court is required to order an insanity aequittee to be detained for diagnosis and evaluation for a minimum of sixty days and a maximum of ninety days in a hospital or treatment facility.3 After the diagnosis and evaluation peri[879]*879od, if certification is made that the acquittee is committable under the civil involuntary care and treatment standards provided in T.C.A § 33-6-104, the district attorney general must file a complaint in criminal court seeking both judicial commitment and an order requiring outpatient treatment. T.C.A § 33-7-303(b)(l). If there is no certification that the acquittee is committable, the district attorney general must file a complaint seeking only outpatient treatment at a mental health facility. T.C.A § 33-7-303(b)(l).
A
DUE PROCESS
We recognize that involuntary commitment to a mental institution constitutes a deprivation of liberty that invokes the constitutional protection of procedural due process. Jones v. United States, 463 U.S. 364, 361, 103 S.Ct. 3043, 3048, 77 L.Ed.2d 694 (1983); Addington v. Texas, 441 U.S. 418, 426, 99 S.Ct. 1804, 1809, 60 L.Ed.2d 323 (1979). Thus, although a state may rely upon its police powers to confine the dangerously mentally ill, it must insure that their constitutional rights are safeguarded. See Jackson v. Indiana, 406 U.S. 715, 736, 92 S.Ct. 1845, 1857, 32 L.Ed.2d 435 (1972).
In the context of a criminal defendant who attempts to assert mental illness as a defense, special interests have been recognized to be of concern. First, we note that the United States Supreme Court has refused to articulate an insanity defense in constitutional terms and has chosen instead to leave its significance to the individual states: Powell v. Texas, 392 U.S. 514, 535-36, 88 S.Ct. 2145, 2156, 20 L.Ed.2d 1254 (1968); see also State v. Hammock, 867 S.W.2d 8, 10 (Tenn.Crim.App.1993) (The manner in which the insanity defense is presented to the jury is left for the state’s determination.) Also, the Supreme Court has previously refused to hold that due process requires the adoption of any given insanity test or allocation of a particular burden of proof. See Leland v. Oregon, 343 U.S. 790, 799-801, 72 S.Ct. 1002, 1007-08, 96 L.Ed. 1302 (1952).
As a result, numerous means have been used both to protect the public from potentially dangerous defendants acquitted by reason of insanity and to insure that the acquit-tee is provided with due process and the equal protection of law. Several states make commitment mandatory after acquittal by reason of insanity. See Lynch v. Overholser, 369 U.S. 705, 708-09 n. 4, 82 S.Ct. 1063, 1066 n. 4, 8 L.Ed.2d 211 (1962). In this respect, three states, Colorado, Kansas, and Michigan, have had provisions similar to that existing in Tennessee at the time of the defendant’s conviction relative to the state having the burden of proving sanity beyond a reasonable doubt and the mandatory hospitalization upon acquittal. In Ingles v. People, 92 Colo. 518, 22 P.2d 1109, 1111 (1933), the Colorado Supreme Court stated that when a defendant properly raises the insanity defense, the burden is on the prosecution to prove beyond a reasonable doubt that the defendant was sane at the time of the commission of the crime. See also State v. Linn, 251 Kan. 797, 840 P.2d 1133, 1141 (1992); In re Certified Question, 425 Mich. 457, 390 N.W.2d 620 (1986). Later, in response to due process and equal protection challenges, the Colorado Supreme Court upheld the provision of the insanity statute that required the trial court to commit an insanity acquit-tee automatically without a precommitment hearing in order to determine the acquittee’s [880]*880mental condition and need for treatment at the time of the commitment. The court stated that where the defendant has been adjudicated not guilty by reason of insanity for acts
which, but for his insanity, would be punishable as crimes, that adjudication furnishes a legitimate basis for the immediate commitment of the defendant to an institution for observation and examination, as well as any needed treatment, so that a reliable determination might be made of his mental condition and what danger, if any, he poses to himself and others.
People v. Chavez, 629 P.2d 1040, 1043, 1048 (Colo.1981). See also In re Jones, 228 Kan. 90, 612 P.2d 1211, 1228 (1980); People v. McQuillan, 392 Mich. 511, 221 N.W.2d 569, 576 (1974).
The Chavez court considered several factors, including the state’s interest in committing those mentally ill persons who have committed dangerous acts and the fact that it is reasonable to infer from an insanity acquittal that the defendant suffered from a mental disease at the time he committed the crime. Also, it stated that it was not “unfair ... to believe that the disorder likely is a continuing one since mental illness for the most part is a long lasting phenomenon.” Chavez, 629 P.2d at 1048. The court noted that an insanity adjudication represented a determination that the prosecution failed to prove sanity beyond a reasonable doubt but concluded that “[ejven under this interpretation, it has been held that a judicially determined doubt as to an accused’s sanity provides a sufficient warrant for immediate commitment and further examination as to his present mental condition. E.g., Bolton v. Harris, 395 F.2d 642, 651 (D.C.Cir.1968); Ragsdale v. Overholser, 281 F.2d 943 (D.C.Cir.1960); State v. Alto, 589 P.2d 402 (Alaska 1979); People v. McQuillan, 392 Mich. 511, 221 N.W.2d 569 (1974).” Id. at 1047.
Also, the Chavez court recognized the ac-quittee’s substantial liberty interest in avoiding involuntary commitment to a mental hospital, but it concluded that due process did not require that a hearing precede the insanity commitment. The primary purpose of such a commitment is to allow the state to assess the aequittee’s mental status and a preeommitment hearing “ “would be meaningless until trained medical experts had a reasonable opportunity to observe and examine the subject and report their finding. [Thus,] some time gap between the verdict and the appraisal of the defendant’s then existing mental condition is unavoidable under any scheme which would provide adequate safeguards.’ ” Id. at 1048-49 (quoting Ragsdale v. Overholser, 281 F.2d at 948). The court determined that due process is satisfied by procedures for release that insure against the risk of continued detention without cause, and significantly for our purposes, the court concluded that the statutory requirement of a release hearing occurring after 180 days of initial confinement did not violate due process.
We agree with the reasoning in Chavez regarding due process considerations of a mandatory hospitalization statute for an insanity acquittee. Automatic commitment of an insanity acquittee provides the state with an in-depth opportunity to assess the defendant’s current mental status and to determine whether he poses a potential danger upon his release. We agree that the fact that the trial court found a reasonable doubt as to the defendant’s sanity at the time of the offense provides sufficient reason for further examination. Moreover, the sixty-to-ninety-day period between the defendant’s acquittal and the hearing to appraise his then existing mental condition is necessary to provide the medical experts with a reasonable opportunity to observe him. Without an evaluation, a trial court would be forced prematurely to evaluate the potential danger an insanity ac-quittee poses to himself or others. See People v. De Ando, 114 Cal.App.3d 480, 170 Cal.Rptr. 830, 834 (1980), cert. denied, 451 U.S. 990, 101 S.Ct. 2329, 68 L.Ed.2d 849 (1981).
The defendant contends that the United States Supreme Court has held that a state may not detain an acquittee who has recovered his sanity and is no longer dangerous without affording him due process. In Foucha v. Louisiana, 504 U.S. 71, 112 S.Ct. 1780, 118 L.Ed.2d 437 (1992), the defendant was found not guilty by reason of insanity and automatically committed under Louisiana [881]*881law, which also required the defendant to remain institutionalized until he proved that he was no longer dangerous. The Court concluded that the law was unconstitutional because it allowed the indefinite, continued confinement of an acquittee without a civil commitment proceeding and without any determination of current mental illness. See id. at 77-86, 112 S.Ct. at 1784-89.
We do not view the defendant’s disposition to be controlled by Foucha. As Justice O’Connor, the fifth vote for the majority, pointed out in her concurring opinion, the Court was not addressing more narrowly drawn laws that only provide for the detention of insanity acquittees. In fact, she suggested that it might “be permissible for Louisiana to confine an insanity acquittee who has regained sanity if ... the nature and duration of detention were tailored to reflect pressing public safety concerns related to the acquittee’s continuing dangerousness.” Id. at 88-89, 112 S.Ct. at 1789.
Furthermore, as previously noted, we believe the state has a strong interest in automatic commitment and “in avoiding the need to conduct a de novo commitment hearing following every insanity acquittal.... Instead of focusing on the critical question of whether the acquittee has recovered, the new proceeding likely would have to relitigate much of the criminal trial.” Jones v. United States, 463 U.S. 354, 366, 103 S.Ct. 3043, 3050, 77 L.Ed.2d 694 (1983).4 Obviously, the fact that the defendant acknowledged that violent acts were committed indicates dangerousness. In this respect, we agree with the jurisdictions that have concluded that the legislature can reasonably enact a mandatory hospitalization provision in order to assure the public that insanity acquittees will not be released until their recovery from past mental illness is definitely established. See Lynch, 369 U.S. at 716, 82 S.Ct. at 1070; Bolton, 395 F.2d at 649; In re Franklin, 7 Cal.3d 126, 101 Cal.Rptr. 553, 496 P.2d 465, 470 (1972); Chavez, 629 P.2d at 1048; In re Jones, 612 P.2d at 1224; Harris v. Oklahoma County Dist. Court, 750 P.2d 1129, 1131 (Okla.Crim.App.1988).
The United States Supreme Court has recognized that in light of the “uncertainty of diagnosis in [the mental health] field and the tentativeness of professional judgment,” the “courts should pay particular deference to reasonable legislative judgments.” Jones, 463 U.S. at 364 n. 13, 103 S.Ct. at 3050 n. 13. The Tennessee legislature has provided mentally ill defendants with the right to an absolute insanity defense and, thus, has the prerogative to impose conditions on those who successfully rely upon such a defense. We do not think that the legislature acted unreasonably in allowing a definite period of sixty to ninety days for examination and diagnosis. “Due process requires that the nature and duration of commitment bear some reasonable relation to the purpose for which the individual is committed.” Jackson, 406 U.S. at 738, 92 S.Ct. at 1858. The legislature undoubtedly considered the uncertainties of psychiatric evaluation in establishing this time period and we cannot say that it is unreasonable in length. Cf. Chavez, 629 P.2d at 1049-50 (six-month initial commitment does not violate due process); McQuillan, 221 N.W.2d at 576 (sixty-day automatic detention is reasonable).
B
EQUAL PROTECTION
The defendant also contends that he would be deprived of his right to equal protection if he were forced to undergo an evaluation in a mental hospital without any showing of need for the commitment. He maintains that he has shown through expert testimony that he was neither mentally ill nor dangerous at the time of his conviction. Although the defendant does not specifically claim that he is entitled to the same protection as one who is civilly committed, he argues that he has the right to a hearing in which the trial court would have the discretion to determine whether or not he should be subject to the sixty to ninety-day evalua[882]*882tion, which essentially would be the equivalent of a civil commitment hearing. In other words, the defendant argues that equal protection prevents his commitment without the equivalent determination made for civil commitments. We disagree.
“Equal protection does not require that all persons be dealt with identically, but it does require that a distinction made have some relevance to the purpose for which the classification is made.” Baxstrom v. Herold, 383 U.S. 107, 113, 86 S.Ct. 760, 763, 15 L.Ed.2d 620 (1966). In the absence of a suspect classification, such as, race, or of an intrusion upon a fundamental constitutional right,5 the challenged classification must “bear some rational relationship to legitimate state purposes.” San Antonio Indep. Sch. Dist. v. Rodriguez, 411 U.S. 1, 40, 93 S.Ct. 1278, 1300, 36 L.Ed.2d 16 (1973). No suspect classification is involved in this case. Also, the mandatory commitment requirement does not implicate a fundamental right because, while commitment constitutes a significant deprivation of liberty, “a person found not guilty by reason of insanity enjoys no fundamental right to unrestricted liberty upon that adjudication.” Chavez, 629 P.2d at 1052.
Significantly, the defendant in the present case admitted that he committed the acts that would otherwise constitute criminal offenses, but that he did so while mentally ill. In this respect, the defendant placed himself in a different position than other criminal defendants or civil commitment defendants by choosing to claim that he was not mentally responsible for his acts. Moreover, we also conclude that the record on appeal does not support the trial court’s “findings” that the defendant was no longer a danger to society at the time of trial and that his hospitalization would result in irreparable harm to him. It is apparent that the extent of the defendant’s potential health problems was not actually known by Dr. Tennison, who acknowledged “a lot more evaluation” could occur. Also, Mr. Wyrick stated that continued treatment was needed “indefinitely,” and he admitted that hospitalization would not be “disastrous,” although he viewed it to be counterproductive.
Thus, we cannot say, even as a matter of evidentiary fact, that the defendant was shown to be in no need of evaluation and treatment relative to his mental health. In other words, although he may avoid the ordinary criminal penalty by successfully relying on the defense of insanity, it is not unreasonable for the legislature to provide for a means by which the state can determine that he no longer suffers from the same mental abnormality that caused the “criminal” acts. In this fashion, the commitment of an insanity acquittee bears a rational relationship to legitimate state purposes so as to comply with equal protection of the law.
Finally, we note that we are not dealing with the situation in which the state requested that the defendant be institutionalized for extensive evaluation shortly before trial and we need not speak to that situation. The defendant was examined once by a psychiatrist at the trial court’s direction and this examination did not take place for approximately ten months after the commission of the crime. Although the defendant did enter therapy following the crime, it consisted of weekly sessions with a clinical social worker on an outpatient basis. We conclude that this type of diagnosis and evaluation is not what the legislature intended and the trial court should not be forced to evaluate the defendant’s condition without the benefit of the intense evaluation, supervised by mental health professionals as provided for by the legislature.
For these reasons, we conclude that T.C.A. § 33-7-303(a) is constitutionally applied in this case. Therefore, the judgment of the trial court is affirmed.
WADE, Judge, concurs.
PEAY, J., not participating.