Well, I don't do criminal law because as much fun as it was in law school, there's a lot more money to be made in contracts even if it is soul crushing (hence, why I spend so much time wasting time on message boards).
But I can tell you that the only document typically available to the press is the initial incident/arrest/police report and not follow-up reports with interviews, details, video recordings, witness interviews and statements, etc. There's nothing else for them to find, because everything past the initial report is held in the case file until a court date. Some of it may be revealed at the inital appearance, but its often held for a trial. If a case is resolved without a trial, most of it never sees the light of day. I worked on a murder case when I was an intern and it ended up with a guilty plea to a lesser charge because the county's investigation had some major problems with it. But none of that was publicly known, the media reports in Chattanooga would have made you think we were going to be crushed in a walkover. There was some minor public outcry over it because so many had read the initial reports and never saw the extra information. And the DA never released more information because they didn't want to throw the investigators under the bus. Not anybody's fault, just the way the system works.