So far, the motives of this case have always been rumored as either sex or drugs or, yes, even rock and roll. Thus far, sexual rage towards Sue, is the only motive proved out by facts. What does Sue's supposed interference in Marty's crumbling marriage have to do with sex?
I staeted thinking about what I know, regarding sex crimes involving actual rape, as well as "lust" murders (in which penile penetration may or may not occur..).
It'd often said that in cases of rape, the motive is not sexual gratification/frustration alone, but more like a way for the perp to feel empowered, by humiliating and subjugating the victim. Penis = weapon, kind of thing. This is supported by the icky practice of 'piquerism' in which a rapist/killer gets deep gratification by stabbing their victims, as it's been noted that people who do this generally also have some kind of sexual dysfunction.... ie, their penis isn't working, so it can't be the 'weapon' of choice... a knife or pin or whatever is used to 'poke' the victim instead.
So when you say "sexual rage", Dmac, I dunno if 'sex' -- as in, he 'wanted' her in a relatively normal sexual way really bad, kind of sex - was as much a part of the plan to attack as say, rage in general. Sue wasn't raped (I'll address this below).. she was, though, wounded, beaten, terrified and humiliated, to a level I can hardly bear to think about.. and then left in a deliberately humiliating 'sexualised' pose, underwear used for gag and binding, a knife slash just above her pubic area.
I am at this stage fairly sure that if the original object was to rape, they'd not have left witnesses alive anyway. But the treatment of Sue, the (literally) many layers of the horror she endured, are decidedly sex-crime-like in nature. The point being, as it is with rape, a "release" of rage for the perp, as well as an expression of dominance, generally pent up via feeling powerless in other areas if his life -- and the points/questions that follow this thought are:
-- Sexual attraction/disappointment was not necessarily part of the original motive -- ie, if the object was "to show her a lesson", and the sexual elements (working peens or not) were used a *weapon*. That said, it could have have been as simple as Loon being there... being part of the pre-planning.. and as we know Marty desperately wanted his wife to stay. To be blunt, actually putting his dick in the victim might have compromised his chances with Marilyn, so he had to make do with other forms of harm.
So if this was a crime of rage, where'd all the rage come from? And why Sue?
I'm kind of leaning to a 'perfect storm' scenario, which I've done before.. but this time, taking 'sexual desire for Sue' out of it, and adding "Loon was part of the rage, on one known level and several speculated ones". And very likely part of the plan as well.
And when it comes to it, who knows???? Sue may have set the psychos off that day, or the week before, or in small increments over time, and so ended up their victim of choice. Maybe they all sat around that afternoon/evening bitching up a storm about Sue until she started looking like a deserving target. Maybe Tony the Greek was a part of the build-up to it. Maybe Sue mortally insulted Marilyn somehow, and she's goaded the men into wanting to hurt Sue.
I dare say we'll never really know unless Loon fesses up -and- tells the truth. So.. likely, never.
But anyway, the idea that Sue became the primary target for a premeditated torture session and murder, simply because she wouldn't date Bo has never sat easy with me. Not the least because this idea comes from... Loon.
More to come, I've just gotta go.