Does a defendant have a reasonable expectation of privacy in the home?

Defendant's characterization of himself as an "occupant" of the home is unavailing. That defendant happened to be inside the house when officers arrived does not mean he had a reasonable expectation of privacy in the residence. Such an expectation must be grounded in " ' "a source outside of the Fourth Amendment, either by reference to concepts of real or personal property law or to understandings that are recognized and permitted by society." ' " (People v. Stewart, supra, 113 Cal.App.4th at p. 250, original italics.) Presence alone when officers arrived is insufficient.