"Realistically," Amendola told reporters, "all that would have done [was] reinforced what you already believe: that Jerry Sandusky is guilty."
Though not uncommon, the waiver was another jaw-dropping development in a case that already led school officials to oust head football coach Joe Paterno and university president Graham Spanier, stirred a half-dozen investigations, and unleashed unending scrutiny on the university. Some attorneys involved in the case said the sudden decision to waive the hearing suggested to them the first step in a possible plea bargain.
For weeks, Sandusky and his lawyer had publicly proclaimed his innocence. Amendola repeatedly said he looked forward to confronting the accusers at the preliminary hearing, and predicted that at least half might dispute the abuse allegations first outlined in a grand jury report.
At least 11 witnesses were prepared to testify, according to Senior Deputy Attorney General E. Marc Costanzo.
They included not only the young men who say Sandusky sexually abused them starting in the mid-1990s, but also Mike McQueary, the former graduate assistant who told the grand jury he saw Sandusky raping a boy in the football team's locker room shower in 2002 and reported the incident to Paterno.
Prosecutors and Amendola have not discussed a plea, Costanzo said, but Sandusky's willingness to forgo the hearing "helps the prosecution in a lot of ways," including by sparing witnesses the spotlight.
None has been publicly identified in court filings, and it was unclear if any would be named in open court. But, Costanzo said, "not having to go through the pain and suffering that's brought by a case like this, I think, is an important factor to consider."
Still, the waiver sparked outrage from victims and their lawyers, who accused the coach and his attorney of gamesmanship.
"I can't believe they put us through this until the last second, only to waive the hearing," one of the unidentified accusers said in a statement released by his lawyer, Ben Andreozzi. "I can't put into words how unbearable this has been on my life, both physically and mentally."
Sandusky, 67, faces more than 50 counts of involuntary deviate sexual intercourse, corruption of minors, and endangerment. Prosecutors contend that he met and groomed his victims through the Second Mile, a charity he founded and ran for underprivileged kids, both while he was a key aide to Paterno and after he retired in 1999.
The preliminary hearing was in some ways expected to be a formality, ending with the judge's declaring there was sufficient evidence to proceed to a jury trial.
Under court rules, Sandusky wouldn't have mounted a defense, and Amendola would have been precluded at the hearing from scrutinizing the witnesses' backgrounds or challenging their credibility.
The case has fixated the state and the sports world, and the proceeding drew international attention. The prospect of such high drama in court was unprecedented in the tiny hamlet of Bellefonte, the Centre County seat 10 miles north of State College.
Police closed streets and increased patrols to accommodate almost 30 satellite trucks, hundreds of reporters from across the country, and other onlookers.
The courthouse in the town square effectively closed for the day, except as host for the proceeding in the second-floor ceremonial courtroom.
Seats there were nearly full an hour before the 8:30 a.m. hearing began. Testimony was expected to last all day.
Ringed by police officers, Sandusky, wearing a dark-blue suit and maroon tie, entered the building through a back entrance, but came into the courtroom through its front doors. A silence washed over the crowd as he walked down an aisle, with Amendola at his side, then hustled into the jury room and closed the door.
Not long after, his wife, Dorothy Sandusky, and more than a dozen relatives and friends filed into their assigned courtroom seats in the front rows.
Almost as soon as Senior Magistrate Judge Robert E. Scott opened the hearing, Amendola asked for a sidebar conference with the judge and lead prosecutor, Senior Deputy Attorney General Joseph E. McGettigan.
Then Scott dropped the news.
"The defendant has chosen to waive a preliminary hearing," the judge announced, before turning to Sandusky at the defense table. "Mr. Sandusky, you understand your right to have a preliminary hearing on this date, and you are giving up your rights."
Sandusky nodded. Within minutes, he was ushered back out the rear door toward a waiting car.
"We fully intend to put together the best possible defense and stay the course for four full quarters," the coach told a crush of reporters before climbing into a black SUV driven by Amendola.
Lawyers for several of the alleged victims said they were shocked. Michael Boni, a Bala Cynwyd attorney who represents a 18-year-old accuser from Lock Haven, said he dined with the teen Monday night and took a front-row seat Tuesday expecting to watch him testify.
Boni's co-counsel, Philadelphia attorney Slade McLaughlin, was one of several who interpreted the waiver as Sandusky's first step toward a guilty plea. "It's absolutely going in that direction," McLaughlin said.
Howard Janet, who represents another accuser, blasted Amendola for questioning the motivation and credibility of the alleged victims, then abandoning the hearing. Had it proceeded, Janet said, "it would have been apparent to the public . . . who was lying."
Amendola dismissed the criticism. After dropping off Sandusky, he returned to the courthouse to face a media throng in the square outside the courthouse. For close to an hour, he answered questions, maintaining Sandusky's innocence, questioning the prosecution's case, and defending the waiver as "a tactical measure."
Amendola said the waiver also made sense because prosecutors agreed to turn over evidence more quickly in the case and not seek any new bail conditions. He flatly denied talk of a plea deal.
"There will be no plea negotiations," Amendola said. "This is a fight to the death. This is the fight of Jerry Sandusky's life."
Sandusky's next court date is a Jan. 11 arraignment, when Sandusky is expected to formally enter a plea on the charges. He remains free after posting $250,000 cash bail, but is under house arrest and subject to electronic monitoring.
Later Tuesday, the lawyers for two former Penn State administrators charged in the case said their clients wouldn't waive their preliminary hearings, scheduled for Friday before a magistrate judge in Harrisburg.
Athletic Director Timothy Curley and former senior vice president Gary Schultz are accused of failing to report McQueary's 2002 allegations to law enforcement and later lying to the grand jury about it.
Through their lawyers, they have denied any wrongdoing.
Contact staff writer John P. Martin at 215-854-4774,
or @JPMartinInky on Twitter.
The Associated Press contributed to this article.