As a broadcaster, I would be objectively alerting the public of what we know so far and what will be done to solve the case/trial. It would be important to include that Keri is the mayor of La Mirada and has just murdered someone. That being said, it would also be important to reassure the townspeople that the situation is in control.
The important parts of the process are the charges, arraignment, preliminary hearing, and most of the trial itself. The biggest story is the preliminary hearing because you can get most of the information of a formal trial without as much of a time crunch. This allows you to know what will be important in the actual trial. You probably wouldn’t need to write about what the expert witnesses in a trial say. You definitely don’t need to attend the second arraignment.