Latest article says she was strangled with a belt. There is a big reward for the killer.
http://abclocal.go.com/wpvi/story?section=news/local&id=8965078
bourne said "Well, unless LE states otherwise, I would not be presuming facts not in evidence. " No obvious signs of sexual assault does not mean there wasn't one. There could have been one, but it wasn't obvious. This sort of crime usually has a sexual aspect. She had lived in the neighborhood for 3 years. Was frequently seen on long jogs in the area, anyone could have followed her home and could have been watching her. He could have had a friendly "hi neighbor" type of relationship and conned his way into her home. He may have been off work due to the holiday.