Chris Bruno has been credited as playing Tony Delrasso. Chris Bruno was not in this production at all. Tony Delrasso was played by Eric T. Miller in every scene the character was in.
Pop Ross tells his son John that Billy came home covered in blood the night of Erin's murder. John talks to Billy, who tearfully states that he killed Erin. John seems shocked. In the last episode Ryan confesses that he, not John or Billy, met and killed Erin at the park and then John and Billy covered it up to protect him. If it was so, why would Billy confess to John that he did it? Didn't they both know it was Ryan? It makes no sense.