I only vaguely remember the documentary. I remember feeling sorry for her initially definitely. I definitely think maybe the first one or some killings were self defence. It seemed reasonable she was in fear of being raped, abused and murdered herself. I think as time went on though, I felt like the killings were more financially motivated because she felt desperate to maintain her relationship with her girlfriend. (Which I remember feeling really sad about. I think she did love her. I remember feeling sad that her girlfriend didn't really seem to reciprocate to the same extent.) That's only from vague recollection though. I definitely remember feeling bad for her but, just because you feel bad for someone, it can't exactly excuse them of murder.
I think the criteria for it being murder/ manslaughter/ self defence are pretty clear. You don't shoot someone in the head and torso without intending to kill them. The self defence plea can only apply when there is a genuine feeling that the victim may kill them first. I think that was present with some of them but, not all.
I'd say some of the killings were cold blooded though. I think the last ones if I remember rightly were effectively for cash and transport.
I don't really agree with the death penalty in general. I think our legal and court systems are too fallible. I don't know in principle really. Some killers, maybe. The Ted Bundy, John Wayne Gacy, Fred and Rosemary West, Peter Sutcliffe, Myra Hindley and Ian Brady's of this world to name some. Their crimes were so horrific, you do kind of think they warrant a very severe punishment. Maybe Wuornois' crimes don't match them. Still- serial murder is obviously serious. Plus, would she have stopped? If she hadn't been caught? Wouldn't she just have kept doing it to fund their life?