I don't think that the case is remotely near to resolved. Lives were shattered. If I had to guess, I'd lean towards sociopathic tendencies with what what divulged about the individual. Even now, I cannot drive down that section of road without wondering how it was even possible. The mere physics of it.
Like I mentioned, it's[the makings of a psychopath] some of my friends interest. Me, not so much. But, I listen, nonetheless.