An exigent circumstance, in the American law of
criminal procedure, allows law enforcement to enter a
structure without a warrant, or if they have a "knock
and announce" warrant, without knocking and waiting for refusal under certain circumstances. It must be a situation where
people are in imminent danger, evidence faces imminent destruction or a suspect will escape.
Generally, an emergency, a pressing necessity, or a set of circumstances requiring immediate attention or swift action. In the
criminal procedure context, exigent circumstances means:
- An emergency situation requiring swift action to prevent imminent danger to life or serious damage to property, or to
forestall the imminent escape of a suspect, or destruction of evidence. There is no ready litmus test for determining whether
such circumstances exist, and in each case the extraordinary situation must be measured by the facts known by officials.
People v. Ramey, 545 P.2d 1333,1341 (Cal. 1976).
United States v. McConney, 728 F.2d 1195, 1199 (9th Cir.), cert. denied, 469 U.S. 824 (1984): "Those circumstances that
would cause a reasonable person to believe that entry (or other relevant prompt action) was necessary to prevent physical harm to
the officers or other persons, the destruction of relevant evidence, the escape of a suspect, or some other consequence
improperly frustrating legitimate law enforcement efforts."
Exigent circumstances may make a warrantless search constitutional if probable cause exists. The existence of exigent
circumstances is a mixed question of law and fact. United States v. Anderson, 154 F. 3d 1225 (10th Cir, 1998) cert. denied
119 S. Ct. 2048 (1999) (citations omitted). There is no absolute test for determining if exigent circumstances exist, but general
factors have been identified. These include: clear evidence of probable cause; the
seriousness of the offense and likelihood of destruction of evidence; limitations on the
search to minimize the intrusion only to preventing destruction of evidence; and clear indications of exigency.
Exigency may be determined by: degree of urgency involved; amount of time needed to get a warrant; whether evidence is about to be removed or destroyed; danger at the site; knowledge of the
suspect that police are on his or her trail; and/or ready destructibility of the evidence. United States v. Reed, 935 F.
2d 641 (4th Cir.), cert. denied, 502 U.S. 960 (1991). In determining the time necessary to obtain a warrant, a telephonic warrant
should be considered. As electronic data may be altered or eradicated in seconds, in a factually compelling case the doctrine of
exigent circumstances will support a warrantless seizure.
Even in exigent circumstances, while a warrantless seizure may be permitted, a subsequent warrant to search may still be
necessary. See Grosenheider, supra and United States v. David, 756 F. Supp. 1385 (D. Nev. 1991).
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