Where's Olivia? And 4 Other Questions Scandal's Season Premiere Answered

As you may have heard, Columbus Short left the show in April following his real-life domestic abuse scandal. I've been wondering how they would write off his character, and now we know. Harrison is killed; it's his funeral that Olivia must return for. We don't know who's responsible for putting a bullet in his head, but Olivia's father has denied any involvement.