The autopsy will have determined whether they, or one, died in the position they were found, or died earlier and was moved. There would be 2 sets of marks on the neck, one from before and one from after death, and the tissue damage would be very different. They can also tell from the way the blood pools in different locations at the time of death, if they were moved.
I don't want to post a grisly quote, but this link explains how someone can hang themselves from a low position, such as L'Wren Scott, who was found slumped on the floor, having used a doorknob.
http://www.forensicpathologyonline.com/e-book/asphyxia/hanging
I don't want to post a grisly quote, but this link explains how someone can hang themselves from a low position, such as L'Wren Scott, who was found slumped on the floor, having used a doorknob.
http://www.forensicpathologyonline.com/e-book/asphyxia/hanging