Pennsylvania State University (PSU) has been rocked by the biggest sex scandal in its history - the university's ex-football coach Jerry Sandusky, 67, has been charged with sexually abusing eight young boys over a 15-year period even as two school officials have stepped down amid accusations of covering up the scandal.

Gerald Jerry Sandusky, a former defensive coordinator, was freed on $100,000 bail over the weekend. A preliminary hearing has been scheduled for Wednesday.

He has been charged with sexually assaulting or making advances on eight boys from 1994 and 2009. Sandusky was running a charitable organization for young people called Second Mile at that time.

However, the charity Second Mile, which was founded to help underprivileged children, said From 2008 to present, Mr. Sandusky has had no involvement with Second Mile programs involving children.

The moral failure of every single person involved is appalling. No one did anything more than try to sweep this problem off-campus, according to the Daily Collegian, the campus newspaper.

Sandusky was under Penn State Coach Joe Paterno at the time. Pennsylvania Attorney General Linda Kelly said Paterno, 84, won't be charged is not regarded as a target in the investigation. However, Penn State Athletics Director Timothy Curley, 57, and Senior Vice President Gary Schultz, 62, who oversaw the university police, were charged with perjury and failure to report the incidents. Curley and Schultz have stepped down from their posts after conferring with the university trustees and their lawyers said they will vehemently challenge the charges.

According to reports, it seems that Schultz and Curley did not have direct contact with those boys Sandusky is accused of abusing.

Schultz's lawyer also noted that Schultz was not among those required  by the law to report suspected abuse.

Curley and Schultz on Monday appeared in a Harrisburg courtroom, where a judge set bail at $75,000, according to the attorney general's office. They must surrendered their passports even though they were not required to enter pleas.

They will go back in court later next week.

The charges at face value are disturbing to say the least, Harrisburg District Judge William Wenner explained.

Sandusky appeared in court on Saturday for bail hearing. Following his appearance, his lawyer Joe Amendola said Sandusky was made aware of the allegations since 2009 when the complaints of a victim's mother made to her son's high school officials prompted an investigation.

According to Pennsylvania State Police Commissioner Frank Noonan, a complaint was made as early as 1998 and if it was acted upon, Sandusky's sexual assaults could have been avoided. But nothing happened and nothing stopped, Noonan told a press conference in Harrisburg.

The Sandusky case is Commonwealth of Pennsylvania v. Gerald A. Sandusky, MJ-49201-CR-636-2011, Centre County, Pennsylvania, Magisterial District Court 49-2-01 (State College). Kelly said Sandusky's indictment details a disturbing pattern of sexual assaults on young boys .