CBI on Thursday (March 21) carried out searches at 19 places across Tamil Nadu, including the residence of Dravida Munnettra Kazhagam (DMK) Chief M Karunanidhi's son M K Stalin in Chennai in a case of alleged tax evasion of imported cars. The CBI team reached the house of Stalin in Chennai, who is alleged to be one of the beneficiaries of importing foreign cars, agency officials said.