Mr Scully has been under pressure to go since claiming last week that a report by former assistant police commissioner Norm Hazzard into the riot last December was not completed.
The government was later forced to release the report but Mr Scully said it was only a working draft.
In parliament today, Mr Scully rejected a claim by Nationals leader Andrew Stoner that he rang the ABC last Monday and said a Nine Network report was wrong to claim he was sitting on the report.
But the ABC later issued a statement insisting Mr Scully had rung the ABC newsroom last Monday night about the Nine Network story.
In a statement to parliament late this afternoon, Mr Scully said he did not recall the conversation with the ABC but accepted it had occurred.