What is there to unravel about the crime? Crazy kid shoots up a school. That's it. The rest is trivia.
The audio expert hired to analyze the gunshots audible in the 911 calls, Paul Ginsberg, recorded a very loud, clear gunshot at 9:46:54 a.m., almost seven minutes after the final gunshot as claimed by Stephen Sedensky in the report summary. I've heard that shot, and so have some in the press; it would be very hard to explain it away, all the more so in that it sounds very much like some of the shots previous to it.
There are a lot of questions. Too many to count. The 911 call audio, in fact, has audible gunfire not just at 9:46, but between 9:46 and 9:51:31 a.m. (when, incidentally, Officer Penna stated he heard a gunshot).
If Adam Lanza was dead, someone else was shooting. That alone is reason enough to continue investigating.
All the audio is publicly available; I encourage those interested to take a listen.
A writer at the Courant contacted Ginsberg to ask about the late shot; Ginsberg said he couldn't speak without the permission of the CSP (incidentally, I just saw Ginsberg on CNN not long ago, weighing in on the MH370 audio. Interesting man.)
This stuff isn't conspiracy, it's, unfortunately, just what sometimes happens. Any case of this magnitude is fraught with issues and tensions and contrasting needs of the various agencies involved.
Ginsberg's report is here: Book 4, 00175096