A “slimy” and “creepy” high-ranking FBI agent groped three of his female subordinates, made inappropriate sexual comments in the workplace and regularly drank on the job, according to documents obtained by The Post. The unidentified G-man, who worked as a supervisory assistant special agent in charge, was investigated by the Department of Justice Inspector General’s Office, which substantiated three allegations of unwanted sexual touching and the illegal boozing, according to the documents, which were obtained through a Freedom of Information Act request. Details about when and where the conduct took place were redacted, but the records show the allegations were...