Karnataka super cop D Roopa, who exposed the prison department in Bengaluru for accepting bribe in order to provide special privileges to inmates has now demanded an ACB probe after her former boss and prisons department chief Satyanarayana filed a rs 20 crore defamation suit against her. Roopa has also added that she will fight the defamation case in court. The IPS officer had filed a report alleging special treatment given to select prisoners including disproportionate assets case convict Sasikala Natarajan and scam paper case convict Abdul Karim Telgi.