[dragontamer]

> If he'd been a police officer investigating a crime,

Which means he'd have to have a warrant. If an Officer was "just investigating", they have to be invited or have a court order to get onto private property.

In America anyway.

[justin66]

It's not quite that simple. If the police officer has probable cause to believe a crime is in progress, or the fire marshal believes a dangerous code violation might exist, woe to the dumbass who tries to escort them off the property.

Otherwise, yes, a police investigator needs permission, or a warrant, to go onto the Apple campus and ask questions or look around.