OPINION
Appellant-defendant Gary Teer appeals his .conviction for unlawful possession of a firearm by a serious violent felon, 1 a class B felony. He contends that 1) the serious violent felon statute violates both the U.S. and Indiana Constitution; 2) the trial court erred in admitting evidence that should have been suppressed on Fourth Amendment grounds; and 3) the trial court improperly sentenced him to sixteen years in prison.
FACTS
The facts most favorable to the verdict indicate that on December 1, 1999, the Indiana State Police received information that Teer had a warrant for his arrest and that he was staying at his father’s house near Milan, Indiana. During the early morning hours of December 1, 1999, the Indiana State Police assembled a team of ten or eleven officers to arrest Teer at the Milan house. After the arresting officers had stationed themselves around the house’s perimeter, the commanding officer telephoned Amanda Teer, Gary’s sister, and requested that she turn on the porch lights and open the front door.
Amanda Teer complied with the request, and then both she and Gary Teer stepped out of the house and onto the front porch. Once Gary Teer had stepped outside, an officer secured him while other officers began conducting a protective sweep of the house. During the protective sweep, an officer found a handgun on a shelf near the door to the front porch. None of the other four adults in the house claimed ownership of the handgun. When an officer asked Teer whether the handgun was his, Teer admitted that he owned it. R. at 353, 407.
On December 3, 1999, Teer was charged with possession of a firearm by a serious violent felon. Following a trial, the jury found him guilty as charged and the trial court sentenced him to sixteen years of incarceration. In enhancing Teer’s sentence, the trial court stated, among other factors, the following aggravator: “Imposition of a reduced sentence or suspension of the sentence and imposition of probation would depreciate the seriousness of the crime.” R. at 206. Teer now appeals.
*287 DISCUSSION AND DECISION
I. Constitutional Challenges to the Statute
Teer first challenges the constitutionality of the serious violent felon statute, claiming that the statute violates 1) the ex post facto protections of both the U.S. and Indiana Constitution; 2) the Equal Protection Clause of the U.S. Constitution and the Equal Privileges and Immunities Clause of the Indiana Constitution; 3) the Eighth Amendment to the U.S. Constitution and Article I, § 16 of the Indiana Constitution; 4) Article I, § 18 of the Indiana Constitution; and 5) the Fourteenth Amendment Due Process Clause of the U.S. Constitution.
Whether a statute is constitutional on its face is a question of law.
State v. Moss-Dwyer,
A. Ex Post Facto
The U.S. Constitution provides that “[n]o State shall ... pass any ... ex post facto Law.” U.S. Const, art. I, § 10. Similarly, the Indiana Constitution provides that “[n]o
ex post facto
law ... shall ever be passed.” Ind. Const, art. I, § 24 (emphasis in original). The
ex post facto
analysis is the same for both constitutional provisions.
Spencer v. O’Connor,
Teer claims that the serious violent felony statute violates the
ex post facto
prohibition “because it uses a felony which occurred prior to the enactment of the statute to punish and outlaw once legal conduct.” Appellant’s brief at 7. In addressing Teer’s contention, we find our supreme court’s analysis of the habitual offender statute
2
instructive. In
Funk v. State,
the defendant had been convicted for a theft that he committed in May 1979.
Teer’s circumstances are similar. In the instant case, Teer was charged for a crime, possession of a firearm by a serious violent felon, he committed on December 1, 1999. The statute criminalizing this act was substantially amended, recodified, and became effective on July 1, 1999.
See
I.C. § 35-47-4-5 (Lexis Supp.2000) (original version at I.C. § 35^47-4-4 (Lexis 1998) became effective on July 1, 1994). The serious violent felony statute addresses and governs Teer’s conduct on December 1, 1999. The statute essentially prohibits the possession of a firearm by a serious violent
*288
felon; it neither re-punishes Teer for the 1996 crime he committed nor enhances the penalty for the 1996 crime.
See
Spencer;
B. Equal Privileges and Immunities
Teer next claims that the serious violent felon statute violates both the Equal Protection Clause of the Fourteenth Amendment and Article I, Section 23 of the Indiana Constitution. Initially, we observe that the rules of appellate procedure require that an appellant’s argument “contain the contentions of the appellant with respect to the issues presented, the reasons in support of the contentions along with citations to the authorities, statutes, and parts of the record relied upon.” Ind. Appellate Rule 8.3(A)(7). However, Teer, focusing his contentions on Article I, Section 23, has failed to provide argument for a federal equal protection violation. Hence, Teer waives the equal protection argument.
Rondon v. State,
The Indiana Constitution provides, “The General Assembly shall not grant to any citizen, or class of citizens, privileges or immunities, which, upon the same terms, shall not equally belong to all citizens.” Ind. Const, art. I, § 23. This provision imposes two requirements upon statutes that grant unequal privileges or immunities to differing classes of people. First, the disparate treatment accorded by the legislation must be reasonably related to the inherent characteristics that distinguish the unequally treated classes.
Collins v. Day,
Teer argues that the serious violent felon statute unreasonably distinguishes “serious violent felons” from the general class of felons. Appellant’s brief at 8. The distinction is unreasonable, hé claims, because the statute defines a serious violent felon by listing twenty-six crimes rather than articulating a general definition. See I.C. § 35-47-4-5(b). Among these listed crimes is dealing in drugs, which Teer claims is not inherently violent. He also argues that the legislature omitted other violent crimes from the statute’s reach that should have been included. For instance, Pointing a Firearm at Another Person 3 or Criminal Recklessness 4 as a D felony are crimes, both involving the use of deadly weapons, that were not deemed serious violent felonies. Appellant’s brief at 9. The serious violent felons, he continues, are then treated disparately from the general class of felons. Appellant’s brief at 8.
We note that “‘[a] classification having some reasonable basis is not to be condemned merely because it is not framed with such mathematical nicety as to include all within the reason of classification and to exclude all others.’ ”
Collins,
The second part of the Article I, Section 23 analysis requires that the statute uniformly apply to all similarly situated persons. Id. Teer has failed to provide any argument regarding this element, therefore, we need not address it. See App. R. 8.3(A)(7). In sum, Teer’s equal privileges and immunities challenge fails.
C. Vindictive Justice
Teer further contends that the serious violent felon statute violates Article I, Section 18 of the Indiana Constitution, which provides, “The penal code shall be founded on principles of reformation, and not vindictive justice.” He argues that the statute’s lack of a staleness time limit for the predicate felony renders it vindictive. Appellant’s brief at 11. Article I, Section 18, though, “applies only to the penal code
as a whole
and does not protect fact-specific challenges.”
Ratliff v. Cohn,
D. Substantive Due Process
Teer’s final constitutional challenge to the statute rests on substantive due process grounds. Substantive due process prohibits state action that deprives one of life, liberty, or property without a rational basis for the deprivation.
Stewart v. Fort Wayne Community Schools,
II. Suppression of Evidence
In addition to constitutional challenges to the serious violent felon statute, Teer claims that the trial court should have suppressed the handgun pursuant to the Fourth Amendment exclusionary rule. The trial court articulated two reasons justifying the search: 1) the officers were permitted into the home and the object was in plain view; and 2) a protective sweep of the premises was permissible for officer safety. R. at 82-83.
When evaluating the propriety of a warrantless search under the Fourth Amendment of the U.S. Constitution, the reviewing court accepts the factual findings of the trial court unless they are clearly erroneous.
Brown v. State,
*290
We note that a warrantless search is presumed unreasonable unless the State meets the burden of showing that an exception to the warrant requirement applies.
Smith v. State,
The evidence adduced at trial showed that there were five other adults in the home at the time the police arrested Teer. R. at 303. Police officers also heard a dog barking, which turned out to be a pit bull. R. at 304. Though Teer points to testimony from one of the commanding officers that protective sweeps were routine no matter the circumstances, we conclude that Teer’s argument is an invitation to reweigh the evidence. We decline Teer’s invitation and determine that officer safety justified conducting a protective sweep inside the home.
III. Teer’s Sentence
A. Constitutionally Proportional
Teer also complains that his sentence was unconstitutionally disproportionate to the severity of the crime under Article I, Section 16 of the Indiana Constitution and the Eighth Amendment to the U.S. Constitution. 5
We note that Article I, Section 16 of the Indiana Constitution provides, in part: “All penalties shall be proportioned to the nature of the offense.” Determining the appropriate sentence for a crime is a function properly exercised by the legislature.
Steelman v. State,
The serious violent felon statute classifies possession of a firearm by a serious violent felon as a class B felony. Our legislature has determined that the presumptive sentence for a class B felony is ten years, with up to ten years added for aggravating circumstances and up to four years subtracted for mitigating circumstances. Ind.Code § 35-50-2-5. Such a sentencing range does not “shock public sentiment” or “violate the judgment of a reasonable people.”
See Pritscher,
B. Sentencing Procedure
Teer also contends that his sentence of sixteen years incarceration was an abuse of discretion. Specifically, he contends that the trial court erred by 1) using an improper aggravating circumstance, 2) failing to take a mitigating circumstance into *291 account, and 3) imposing a sentence that is manifestly unreasonable.
We initially note that the determination of a sentence rests within the sound discretion of the trial court.
Smith v. State,
1. Improper Use of an Aggravating Circumstance
In sentencing Teer, the trial court stated the following aggravating factor: “Imposition of a reduced sentence or suspension of the sentence and imposition of probation would depreciate the seriousness of the crime.” R. at 206. This factor applies only when the trial court considers imposing a sentence shorter than the presumptive sentence.
Montgomery v. State,
However, as Teer concedes, and we agree, that use of an improper aggravating factor does not invalidate a sentence if other valid aggravating factors exist.
Hackett v. State,
2. Consideration of Mitigating Circumstances
We note that the determination of whether a circumstance is mitigating is within the trial court’s discretion, and the court is not obligated to explain why it does not find a circumstance mitigating.
Dunlop v. State,
Here, the court did not abuse its discretion in refusing to find the proffered circumstances mitigating. Teer claims that his decision to submit to the arrest peacefully should have been accorded mitigating status. However, Teer’s submission to arresting authorities was an obligation, thus, it deserves no mitigating weight.
*292 S. Manifestly Unreasonable
Finally, Teer argues that imposition of the sixteen-year sentence was manifestly unreasonable. As noted above, the trial court found several aggravating factors, including the defendant’s criminal history, probation violation, and pending charge in Arkansas. Based on these aggravating factors and lack of any significant mitigating factors, we cannot say that the trial court’s imposition of the sixteen-year sentence was manifestly unreasonable.
CONCLUSION
In conclusion, we determine that 1) the serious violent felon statute was not shown to violate the U.S. or Indiana Constitution; 2) the trial court did not err by refusing to suppress the handgun from evidence; and 3) the trial court committed no reversible error in sentencing Teer.
Judgment affirmed.
Notes
. Ind.Code § 35-47-4-5(c) prohibits a serious violent felon from knowingly or intentionally possessing a firearm. This statute deems, among others, one who sells a "schedule IT’ substance a serious violent felon. I.C. § 35-47 — 4—5(b)(24). Methamphetamine is considered a "schedule II” substance. Ind Code § 35-48-2-6(d)(2). Teer had been convicted of manufacturing and possessing methamphetamine by an Arkansas court on September 20, 1996. The serious violent felon statute criminalizes the knowing or intentional possession of a firearm even if the serious violent felony was committed in another jurisdiction. I.C. § 35 — 47—4—5(a)(1)(B).
. Ind.Code § 35-50-2-8, which became effective on October 1, 1977, permits a sentence enhancement based on two prior unrelated felony convictions.
. Ind.Code § 35-47-4-3.
. Ind.Code § 35-42-2-2.
. Teer has waived any Eighth Amendment claim inasmuch as he has failed to present a cogent argument on federal constitutional grounds.
