Former union official Derrick Belan and his niece, bookkeeper Danielle O’Brien, have been arrested and charged with a series of fraud-related offences worth hundreds of thousands of dollars. The 45-year-old former New South Wales secretary of the National Union of Workers was arrested at his home at Berkshire Park in western Sydney yesterday and charged with 24 fraud-related offences worth $440,000 and two counts of belonging to a criminal group. Police alleged the pair misused union credit cards, processed false invoices and made fraudulent electronic transfers and withdrawals of funds from union accounts.