What is the fine-grained topic of the following text: Just a few weeks after his portrait was chosen winner of the Archibald Portrait Prize high profile barrister Charles Waterstreet (below left) has had to withdraw from the drugs and murder trial involving former policemen Roger Rogerson (below right) and Glen McNamara who are accused of murdering Jamie Gao. Only return the topic.
Charles Waterstreet's withdrawal from the Roger Rogerson and Glen McNamara trial