A defense attorney who used to work as a county prosecutor targeted vulnerable clients for sex, exploiting four women in exchange for legal work he did for them or their family members, the Pennsylvania attorney general’s office said Monday. Corey J. Kolcharno, 47, is charged with four counts of promoting prostitution after an investigation found he took advantage of his clients' legal and financial troubles, tethering "his performance as their counsel to a demand for sexual services from them or in exchange for payment," police wrote in an affidavit.