Does a police officer's observation of activity within a private residence constitute a search?

A private residence is a place in which an "'individual normally expects privacy free of governmental intrusion not authorized by a warrant . . . .' [Citation.]" (People v. Camacho, supra, 23 Cal.4th at p. 831.) Even so, an officer's observations of activities within a residence do not constitute a search and thus do not violate the Fourth Amendment if the officer is in a place he otherwise has the right to be when the observation is made. (Id. at pp. 831-832.)