Registered records for Dr. Gero before world filtering: death 1, killing 1. Counts describe entries, not people or lifetime totals. Death sources include Chapter 350.
The filter uses the world where the event occurred, not the character’s origin. Distinct future branches remain separate entries.
After Android 17 pierces Dr. Gero's chest and severs his head, he crushes the still-talking head underfoot. This is separate from Dr. Gero's death in the future.
Android 20 twists the neck of the driver inside the car, and the driver falls out of the vehicle. This is separate from the later energy-beam attack on the city.