Method and system of anti-circumvention monitoring in vehicle ignition interlock operation

An ignition interlock device (IID) comprising:

• a processor;
• and
• a non-transitory memory including instructions, the instructions when executed in the processor causing operations comprising:
• detecting an electrical power state of a vehicle electrical system in a vehicle comprising an ignition interlock device (IID) that includes at least a relay device and a controller device electrically interconnected within the vehicle electrical system, wherein the electrical power state comprises one of a voltage state and a current draw state of the vehicle electrical system;
• measuring a rate of degradation of the electrical power state;
• comparing the measured rate of degradation of the electrical power state to a threshold rate of degradation;
• inferring an IID circumvention event in accordance with the measured rate of degradation being above the threshold rate of degradation;
• reporting, responsive to the inferring, the IID circumvention event to a central monitoring server computing system;
• and
• initiating, responsive to the inferring, a timed countdown to a vehicle lockout state, wherein the vehicle is rendered inoperable at the end of the timed countdown.

A non-transitory computer readable memory storing instructions executable in a processor device, the instructions when executed in the processor causing operations comprising:

• detecting an electrical power state of a vehicle electrical system in a vehicle comprising an ignition interlock device (IID) that includes at least a relay device and a controller device electrically interconnected within the vehicle electrical system, wherein the electrical power state comprises one of a voltage state and a current draw state of the vehicle electrical system;
• measuring a rate of degradation of the electrical power state;
• comparing the measured rate of degradation of the electrical power state to a threshold rate of degradation;
• inferring an IID circumvention event in accordance with the measured rate of degradation being above the threshold rate of degradation;
• reporting, responsive to the inferring, the IID circumvention event to a central monitoring server computing system;
• and
• initiating, responsive to the inferring, a timed countdown to a vehicle lockout state, wherein the vehicle is rendered inoperable at the end of the timed countdown.