Philadelphia-area lawyers Michael Boni and Slade McLaughlin said in a statement Monday that they have been retained to represent Victim 1 and his mother.
Authorities say Victim 1 is among eight boys molested over 15 years by Jerry Sandusky, a former Penn State assistant football coach. Sandusky says he is innocent.
Boni says he anticipates filing a lawsuit against Sandusky and others "when the time is right."
A grand jury began investigating Sandusky after Victim 1's mother reported Sandusky sexually assaulted her son in Clinton County in 2008.
The attorneys say they have also represented victims of the clergy sex-abuse scandal in the Philadelphia archdiocese.