A day after polling in Tamil Nadu, Enforcement Directorate (ED) on Friday filed its chargesheet in the 2G case against DMK chief M Karunanidhi's wife Dayalu Ammal and daughter Kanimozhi besides former telecom minister A Raja under Prevention of Money Laundering Act. br br On this, the ED has taken a different track than CBI that had exonerated Ammal in the case and made her a prosecution witness. In the 2G trial court, Ammal's lawyers had argued that she was unaware of the affairs of Kaliagnar TV, that allegedly received questionable funds.