A retired top police official has filed a Rs 20 crore defamation suit against senior police officer D Roopa for bringing him under a cloud of bribery allegations over “preferential” treatment given to jailed AIADMK leader V K Sasikala in the central prison in Bengaluru.

In a report submitted in July to the-then DGP (Prisons) H N Sathyanarayana Rao, Roopa as Deputy Inspector of General (Prisons) had said there was “a talk” that Rs 2 crore had exchanged hands to give “preferential treatment” for Sasikala and that there were bribery allegations against him also.