The man, known as Victim 2, has not yet revealed his name to the public. His lawyers will be Justine Andronici and Andrew Shubin, according to the statement released by the attorneys.
Victim 2 was sexually abused in the shower on a Friday night about 9 p.m., an incident that Mike McQueary, then a graduate assistant on the Penn State football coaching staff, said he saw and reported to Joe Paterno the next day.
The event became the linchpin in the case against Sandusky, who was convicted on 48 counts for sexually abusing 10 boys over 15 years.
Prosecutors were not able to identify Victim 2 for the trial but McQueary was called to testify.
"Our client has to live the rest of his life not only dealing with the effects of Sandusky's childhood sexual abuse, but also with the knowledge that many powerful adults, including those at the highest levels of Penn State, put their own interests and the interests of a child predator above their legal obligations to protect him," the lawyers' statement said.
The lawyers added in their statement that they have overwhelming evidence that Sandusky molested the boy for many years and that the man stepping forward is in fact Victim 2.