When disconnected, my battery will sit at around 12.8 volts. I tested the current draw by disconnecting negative terminal and then using the multimeter in series. It read -1.8 amps, which is a ton. I also tested the voltage after immediately turning off the car. The voltage drops quickly from 14 volts to 10.5 volts within 30 seconds, you can watch the numbers fall.
What could cause a draw this large?
If the battery voltage drops from 14 to 10.5 volts in 30 seconds with a 2 amp load, then the battery has no capacity and needs to be replaced before you can properly diagnose a parasitic load issue.