The Starr Report, presented on Sept. 9,1998, presented 11 impeachable offenses. Bill Clinton was eventually charged because he "...willfully provided perjuries, false and misleading testimony to the grand jury," and made "...corrupt efforts to influence the testimony of witnesses and to impede the discovery of evidence."
The first of the possible offenses presented in the Starr Report was that President Clinton had lied under oath during the civil case when he denied any sort of sexual relations with Monica Lewinsky. The President also lied under oath to the grand jury about his sexual relations with Ms. Lewinsky.
He also lied in a civil deposition about ever having been alone with Ms. Lewinsky and the gifts that he had exchanged with her. There was evidence of him discussing the Jones case with Ms. Lewinsky as well. Throughout the course of the Jones case, Bill Clinton obstructed justice with Ms. Lewinsky by jointly concealing the truth of their relationship.
Clinton attempted to obstruct justice by helping Monica Lewinsky get a job in New York when her witness could be detrimental if she told the truth in the Jones case. The President lied again under oath in his discussions with Vernon Jordan regarding Ms. Lewinsky's involvement in the Jones case.
Following this civil disposition, President Clinton attempted to tamper with a potential witness by influencing his secretary. Refusing to testify for seven months was an attempt to obstruct justice during the grand jury investigation. Finally, President Clinton abused his constitutional authority in several ways throughout the course of the investigation.