In a lawsuit filed Thursday against the Chicago archdiocese, a boy who attended the parish and played in a church basketball league where McCormack was stationed claims that from 1999 until 2006 he was abused by the former priest.
McCormack pleaded guilty in 2007 to charges that he abused five other boys and remains behind bars.
"It's unspeakable, they live in quiet, in shame, for years and they believe it's their fault, they believe that they did something wrong, and just being able to talk about it provides some relief," said William Martin, co-counsel.
The Chicago archdiocese says they have not seen the lawsuit and they do not comment on pending litigation.
