Scenario 1: Mentally retarded adult with a mental age of 5 lunges at his caretaker in a 3rd floor room to hug her after not seeing her all day, but accidentally knocks her through the window behind her where she falls to her death...
VS
Scenario 2: Mentally retarded adult with a mental age of 5 lunges at his caretaker in a 3rd floor room because he hasn't seen her all day, and in anger pushes her backwards into the window, which breaks, and she falls to her death...
---
Scenario 1 is rightly considered an accident.
Scenario 2 is rightly considered murder. Or at the very least, homicide.
(
@Clete Is scenario 2 what you would consider "non-accidental"?)