http://drdrew.blogs.cnn.com/2011/09/08/knotting-expert-talks-rebecca-zahau-case/?hpt=dr_t5
This whole thing seems so well planned out. Too planned out for someone who has no knowledge of how to do this. It's been stated that what triggered her "suicide" is the mysterious voicemail informing her of MS turn for the worst. I believe the LE stated that there were no searches on hanging done on her computer. So how would she even know how to do this? The knotting expert on Dr. Drew stated how impossible it would have been for her to bind her hands the way they were behind her back.
Also, the shirt. She had tiny traces of "black material" on a few fingers, but also paint on her chest and back. wouldn't she have more paint on her fingers if she also had paint elsewhere? Wouldn't there be paint on the shirt as well?
I wonder if the shirt was possibly used to strangle her into unconciousness at first and then put over the noose to use as a gag. Hence no strangulation marks.
Also, what confuses me is the lack of footprints on the balcony. Wouln't she atleast go out to the balcony to measure the rope over the railing to be sure it was the proper length needed? Wouldn't she need to shuffle along the balcony if she did this herself since her legs were bound? There were only partial heel prints at the very front of the balcony where the door is. The lack of any other footprint or disturbance of dust on the balcony, to me, shows that this whole thing was done too carefully for it to be a suicide. I really don't believe that anyone who was doing this themselves would even think of this detail.