DJI Spark has been stolen in Jan 2019 and, also filed a police case but no update till now.

DJI Spark SN#0ASUFAQ00401QY

We are sincerely sorry to hear about the experience. Regretfully, we are unable to track your stolen aircraft. Tracking it would require the aircraft to be flying when it was lost through the flight record on your DJI Go 4 App. Please keep communicating with your local authorities.
Hoping we could do more, we apologize. Thank you for understanding and have a great day.