The digital forensic examiner would first get a copy of the warrant—the judicial authorization—to see what is the scope. They would determine which tool to use, depending on capability. Those capabilities vary depending on the make, model and operating system. They would retrieve—as much as possible—an image of the device. Sometimes it's not possible. Sometimes it's not possible at all to retrieve anything. Once the information is retrieved, the digital forensic examiner would then narrow it down to the width and scope of the warrant.
That is the report that would be provided to the investigator.