> From a technical standpoint you can't construct a narrative around victims, because by virtue of the fact they're victims and the only time they're relevant to the overarching story of the serial killer is at the point they are killed.

This is something along the lines of how I feel about it and wanted to say. The whole reason we're talking about them at all is because their lives were taken away, yes they're complete human beings their entire lives before and should be respected as such, of course. But the killers are the reason the stories are happening and are just naturally what makes for a more interesting story.