In this particular case (i believe) the user actively turned on the feature which saves your entire location history and journeys on Google's servers so that you can go back and review later. It was opt-in.
Google has since redesigned this feature so that the history lives on the phone itself, not on their servers (removing the possibility for police officers to request this information from google - search warrant or not).
Google has since redesigned this feature so that the history lives on the phone itself, not on their servers (removing the possibility for police officers to request this information from google - search warrant or not).