You’re not being clear.
Kaarma’s girlfriend did call 911 and attempted to revive Dede.
It cannot be possible to deliberately aim for the head in a dark garage, unless one’s eyeballs can perceive infrared light.
An open garage, even at midnight, is not a trap, even if setting a trap was somehow “immoral”. Who enters a stranger’s garage after midnight to look for “something to drink”?
Now where did the "deliberately aim for the head" straw man come from?