IMO puzzle is 99.9 percent finished .
What? At present you lack the following:
1. Forensic evidence (TOD, fingerprint evidence, spray paint residue, fibers, etc.);
2, Cell phone records (pings, number of calls made, pattern of calls showing routine or no routine);
3. Information regarding what, if anything, LE found at the side of the highway (e.g., discarded DVR, glove, other);
4. Video evidence (e.g., from his home, Gold's Gym, entryway to subdivision);
5. Information regarding the threats (i.e., how often, how many, typed or hand-written, what did they say, etc.)'
6. Statement from his girlfriend;
7. Statements from the family (i.e., maritial problems, history of abuse, or nothing out of the ordinary known to them);
8. Electronic evidence (i.e., history of e-mails, etc.).
That seems a lot less than 99.9%, or whatever it was you claimed, to me anyway.