On 11 Jul 2018, In a surprise move, the NSW Police announced the reward of $1 million in a bid to encourage people to offer up a "final piece" of information to prosecute those involved in the 2014 murder of Joseph. Police believe people who murdered Joseph were known to them and that he was murdered for financial gain and betrayed by the people he trusted. Police also allege that his body was dumped in a barrel and dissolved in acid.