I believe they are saying she was dead already and the officer beat her body with a stick.
That could be true, I doubt there is any data to prove it either way.
But I was giving the cop the benefit of the doubt, that maybe the cop thought Rosanne was still alive and needed to be killed.
Because otherwise, beating an already dead woman lying on the ground is SO SICK AND EVIL that it boggles my mind.
Abuse of a corpse, then.