That's right. The most telling remark during the entire session with Larry King tonight was the comment (by Elizabeth's mother, I think) that it will be impossible for whoever took Elizabeth to have a life with her (paraphrasing).
That sure suggests the family at least has an inkling who did the deed and believes she is safe, but being held somewhere. Also suggests they do not believe it is anyone on the list of suspects now in custody or other names already in the news.