2012 Ford Taurus SEL - Battery keeps dying overnight

For the past 6 months, my battery has drained overnight 5 or 6 times. I tried fixing it by completely removing an aftermarket CarPlay unit that occasionally stayed on after turning off the car. However, ever since removing it, the battery seems to be dying even faster.

AutoZone tested the battery as good, but today it was sitting at around 10V.

My multimeter fuse tests are coming up weird (reading almost nothing), so pulling fuses hasn't isolated it yet.