The buzz that former Mumbai Police Commissioner Param Bir Singh may have fled the country as investigators were about to close in on him in a bunch of cases has triggered sparring between the Congress and the BJP. "When the [Sachin] Waze episode happened, I had said that if I was in the government, I would have arrested Param Bir Singh first. This means the centre used this IPS officer to defame the state government and so that is why they have aided Param Bir Singh in escaping abroad," Maharashtra Congress Chief Nana Patole said.