law only to assist our analysis. See Michigan v. Long, 463 U.S. 1032, 1049-50 (1983); State v. Smith, 141 N.H. 271, 274, 681 A.2d 1215, 1217 (1996). The Federal Constitution offers no greater protection in this context. Smith, 141 N.H. at 275, 681 A.2d at 1218.
Part I, article 19 provides that “[e]very subject hath a right to be secure from all unreasonable searches and seizures of his person, his houses, his papers, and all his possessions.” “A warrantless search is per se unreasonable and invalid unless it comes within one of a few recognized exceptions.” State v. Theodosopoulos, 119 N.H. 573, 578, 409 A.2d 1134, 1137 (1979), cert. denied, 446 U.S. 983 (1980). “Absent a warrant, the burden is on the State to prove that the search was valid pursuant to one of these exceptions.” State v. Sterndale, 139 N.H. 445, 447, 656 A.2d 409, 410 (1995).
One such exception exists for exigent circumstances that make it impracticable to obtain a warrant. State v. MacDonald, 129 N.H. 13, 20, 523 A.2d 35, 39 (1986). “[W]hether exigent circumstances exist is largely a question of fact to be determined by the trial court which we will not disturb unless clearly erroneous.” Id. at 21, 523 A.2d at 39 (emphasis added) (implying that determinations of whether exigent circumstances exist also involve questions of law). We have held that “exigent circumstances refer to those situations in which law enforcement agents will be unable or unlikely to effectuate an arrest, search, or seizure, for which probable cause exists, unless they act swiftly and, without seeking prior judicial authorization.” Id. at 20, 523 A.2d at 39 (quotation omitted). Exigent circumstances also exist where there is a compelling need for immediate official action and a risk that the delay inherent in obtaining a warrant will present a substantial threat of imminent danger to life or public safety. Id. This appeal concerns the latter exigent circumstances situation.
The State argues, and the trial court found, that Officer Santuccio had a legitimate concern for his safety when he observed the vehicle’s trunk ajar. He was aware that Torres had recently been arrested for armed robbery. Furthermore, Officer Santuccio had just been surprised by an unexpected person in the car and thought yet another subject awaited him in the trunk. We agree with the trial court that this concern constituted exigent circumstances.
We find instructive the case law developed in connection with concern for officer safety during residential arrests and searches.
See Maryland v. Buie, 494 U.S. 325, 334 (1990);
United States v. Daoust, 916 F.2d 757, 759 (1st Cir. 1990);
Smith, 141 N.H. at 277, 681 A.2d at 1219. In
Buie, the United States Supreme Court held that