Can police enter into a house without a warrant?

Police entry into a house without a warrant is constitutionally permissible if there exist (1) probable cause for the search, and (2) exigent circumstances that justify dispensing with the warrant requirement. Murdock v. Stout, No. 93-56248, 1994 WL 239366, at * 3 (9th Cir. Apr. 26, 1995). Exigent circumstances has been defined as: "those circumstances that would cause a reasonable person to believe that entry ... was necessary to prevent physical harm to the officers or other persons, the destruction of relevant evidence, the escape of the suspect, or some other consequence improperly frustrating legitimate law enforcement efforts." Id. (quotation omitted).