I am wondering about the neck ligature marks.
If she went over the balcony on her own and died from hanging without the tee shirt knotted tightly around her neck then the rope would have slid up to right under her chin and she would have had the classic inverted v ligature mark below her right ear.
However, the autopsy report stated that she had an atypical ligature mark and without the inverted v. The ligature mark was more horizontal when it should have been more oblique. I'm wondering if the ligature stayed lower and straighter across her neck because the tee shirt held it in place and hence the rope was not free to move up and under her chin. Maybe that is why her neck did not break and she did not have the inverted v.
She could have been strangled to death before she was thrown over. The hanging rope ligature could have then been applied over the strangulation ligature mark and held in place by the tee shirt.
If the killer would have simply hung Rebecca without the tee shirt, then when she went over, the rope ligature would have moved up and under her chin to form a second ligature mark with the inverted v.
Two visibly distinct ligature marks, a thinner one below the chin area and over the Adam's apple and a thicker one under the chin with the inverted v under the right ear would have then exposed the true cause of death as strangulation and the hanging as an antecedent cover-up.
https://docs.google.com/viewer?a=v&...TItOWM1Mi00NGE4LWEyZDgtMjc3OWUxZTYzYmY5&hl=en