Just my general opinion here, based on everything I have seen and read in total. I think it is very hard to make out what is fact and what is rumor. IMO, probably some of the people (and not just DT) interviewed by the media or posting on message boards are either outright lying, or the information they gave has no relevance to her murder. It's hard to sort out what is and is not relevant with so little "official" information being put out.
1. I don't think it is anyone that has been specifically named, with the exception of Kyle that we don't have a full name for and I don't want to discuss further since some posters state he is/may be a minor.
2. I think it was probably a stranger or a virtual stranger. By that I mean someone who may have seen her before, but had no connection to the family.
3. I think the crime was not planned, and the opportunity presented itself when Somer ran off from her siblings. I think it was a sloppy crime that left a lot of evidence. Much of my opinion on this comes from discussing the case with a family member who has experience and training in forensic science (Disclaimer: family member does not live in this area and has NO connection to this case, just offered their general opinion to me).
4. I think LE has a good idea of who did it. They don't feel the need to release any further information or continue to ask for the public's help because they have what they need and have to put it all together.
5. I think it was probably sexually motivated. This is what I'm least sure of, and go back and forth on. I think there is a possibility it was even an older juvenile SO. If not sexually motivated, think it was either one or more teenagers.
All of the above is JMO of course for right now.