According to the above fuel graph (yellow line), during 01:13 to 01:23 AM of Oct 9th, there was a fuel drop obviously. Is the fuel theft real or false?
Speed (blue line) and ACC state (Green line) indicates the vehicle was parking when the fuel dropped.
Is that possible the fuel sensor wire disconnected to the GPS tracker device so the fuel data looks dropped? Below fuel graph we checked the fuel drop time period more specifically, you can see the fuel drop is gradually. Additionally, the fuel didn't drop to zero, still kept 15 liters. This picture indicates the fuel drop is not associated with the wire disconnection. Since if the wire was disconnected, the fuel level would drop straightly instead of gradually, and the fuel data would drop to zero.
Summary: the vehicle is in movement or parking, the fuel drop straightly or gradully? Thees two factors can help you judge the fuel theft is real or false.