Miller's attorney - Charles Schmidt - did not return calls for comment Friday. He has previously described his client as a central Pennsylvania man who met Sandusky through Second Mile programs.
Sandusky invited the young man - who was 12 at the time of the alleged abuse - to his office, gave him whiskey, and touched his genitals, Schmidt has said. After the death of his mother, the boy purportedly formed a close relationship with the Second Mile founder.
Attorney Jeff Anderson made similar accusations on behalf of his client last month at a news conference announcing the filing of his own suit. That man - a 29-year-old identified as "John Doe A" - claimed Sandusky abused him more than 100 times during a four-year period starting when he was 10.
Both legal actions were filed in Philadelphia because they allege the abuse occurred there.
Neither Schmidt's client nor Anderson's was among the 10 victims at the center of Sandusky's ongoing criminal case.
But their allegations play out along lines similar to those detailed in a 28-page grand jury report unsealed in November. Prosecutors allege Sandusky groomed young boys he met through the Second Mile as potential victims and gave them with gifts and access to the Penn State football program.
Two Penn State administrators face charges of failing to do enough to stop the alleged abuse. Head coach Joe Paterno and university president Graham B. Spanier lost their jobs but were not charged with any crime.
Sandusky has pleaded not guilty to the charges and vowed to fight the criminal charges and civil cases in court. His attorney, Joseph Amendola, did not respond to interview requests Friday.
Since Sandusky's arrest, officials at Penn State and the Second Mile have vowed to cooperate with ongoing investigations, but they have remained tight-lipped about specific cases.
Contact staff writer Jeremy Roebuck at 267-564-5218, firstname.lastname@example.org,
or @inqmontco on Twitter.