Four police officers of the Antipolo City police station were caught in an entrapment operation Monday night by a task force after a complainant said the cops were allegedly asking for P50,000 in return for filing a lower drug charge on her son. Her son, the complainant said, was arrested by the four cops on July 20, a report from the Philippine National Police Counter Intelligence Task Force said. Arrested were  PO1 Alejo De Guzman;  PO2 Randolf Opeñano;  SPO1 Ginnie San Antonio ; and  PO2 Erwin Fernandez, the task force said. DMS