I don't think the crown is too worried about the soap opera and supporting the defense theory that she ran off with someone else. Right now they are just trying to show that yes she had known issues and they weren't the cause of her death. If the crown didn't get this info out there the defense would bring them out and raise reasonable doubt. They are also just trying to prove she is in fact dead as well. I am sure later on they will have solid evidence that it was DM and MS that killed her. This soap opera isn't fun, but is neccessary to prove she is dead and her issues are known, but she didn't just disappear.