Could imprison them
Well, yes, true, but being imprisoned is not really much of a better fate from a story viewpoint than being executed is. It still has the effect of taking you out of the story. I guess being enslaved is an option, though, although who she'd be a slave
to is another matter.
Also, what did you think of my suggestion? I like it because it allows me to have two seperate torture scenes....
Also, who would be the torturer if Rider is the victim?