Victim 1 and the other young men will confront Mr. Sandusky from the witness stand for the first time since their allegations were made public in a graphic grand-jury presentment last fall.

WSJ: Jerry Sandusky Trial Will Hinge on Portrayal of Accusers

Mr. Sandusky told the boy, then 11 or 12, he would like to spend more time with him, according to the presentment, and took him to Penn State games, and gave him money.

WSJ: Sandusky Jailed After New Abuse Charges

Later, when the boy was allegedly invited to Mr. Sandusky's home, behavior such as hugging, rubbing, cuddling and tickling, initially viewed as acts of affection, escalated to sexual assault, according to the presentment.

WSJ: Sandusky Jailed After New Abuse Charges

According to a grand-jury presentment released by the attorney general's office, one of the alleged new victims, known as Victim 9, met Mr. Sandusky in 2004 while attending a summer camp organized by the Second Mile.

WSJ: Sandusky Jailed After New Abuse Charges

The Attorney General's office has not yet identified this victim, known as "Victim 2, " but Mr. Sandusky's lawyer, Joseph Amendola, has said that victim has been found and doesn't support the testimony in the grand jury presentment.

WSJ: Former Penn State Officials Curley, Schultz Focus On McQueary Credibility

Mr. McQueary testified that he witnessed Jerry Sandusky sexually assaulting a boy in the shower of a Penn State locker room on March 1, 2002, according to a grand jury presentment released by the state attorney general's office.

WSJ: Former Penn State Officials Curley, Schultz Focus On McQueary Credibility