Retrieving data from the copter

Hi,
I am a part of drone club of our university. A group of students have taken a drone with Cube Orange controller from the inventory without permission and they were identified with help of CCTV footages. The drone was recovered from them. The data in the SD card was wiped by them(Possibly zero filled) and the the flight plan was also not there in the memory when we checked it with Mission Planner. We took some help and got the dump of the EEPROM where we saw some plain text logs are also present, but no location data.

Is there any way to identify the locations the drone was in or waypoints fed into the system for autopilot? I am supposed to provide a report to the Head of Department to make sure that the drone was not misused for any illegal activities.

Thank you