There’s no reason to make this any worse than it has to be, by focusing on the worst possible things that could have happened to her.
Regardless of what happened, this was bad.
We don’t know that he sadistically tortured her, or that she suffered for an extended period of time.
We could spend days speculating on this stuff, and it doesn’t get us anywhere.
Most killers aren’t serial killers, and most serial killers aren’t Jeffrey Dahmer.
We remember guys like that, because what they did was so unusual in the first place.
That sort of thing doesn’t happen with any regularity.
I think he raped her. He killed her. And then he burned her.
He kept no trophies, and his concern was self preservation.