I don't know how many readers here on Hailey's thread followed the abduction and murder of Canadian 8 year old Victoria Stafford on her way home from school in 2009, but I have to say, that there are some parallels to Hailey's case.
-Victoria's mother was extremely unemotional, she had press conferences everyday, and her behaviour was not what the general public "thought" it should be. Along with Victoria's mother, the mother's boyfriend and also her best friend were top POI's the entire investigation.
-Some of the people around Victoria were involved with drugs, including Oxycontin.
-While LE had great difficulty ruling out family members, they also ran a parallel investigation, and did make 2 arrests (1 conviction to date), and, despite the appearance of guilt, Victoria's family was innocent.
So, while the appearance, actions, history and circumstance of Billie and Shawn may extremely suspect, leaving little room for doubt, it would be best if everyone take note of the fact that things can seem suspicious and mean nothing at all to the case.