Not necessarily. There is a youtube creator who constantly imagines all the gory things that probably, she says, happened to Bella and Cece, aside from being smothered to death.
Why don't we wait awhile for the details before suggesting she cut off his ears? Or, did you mean chopped them off? She could have slapped him, he lost his balance, and he could have fallen to hit his head on the bumper of the car and died in that way. Freaked out, moved him, destroyed evidence etc. Similar to what happened to Jessie Davis, but in that case there was desecration that we so far don't know about here. She should get the full measure due her from the law. But speculating on gruesome, invented gory details reflects on Gannon, not on her. Why would you want to see him like that in your imagination?