Update 7 August. Sorry, this event has sold out. You can put your name on a waiting list, for when more tickets are released closer to the event.Also, the panel chat will be posted to the Trace feed, as well as on the Wheeler Centre’s website and podcast.Rachael Brown is taking part in a panel chat at Melbourne's Wheeler Centre with Maria's oldest son Mark James, and retired homicide detective, Ron Iddles.It's their first appearance together to discuss the case and its insistent questions.How has the investigation affected them? Buoyed them? And what are their hopes moving forward?