By: Marvel Release Date: 10/31/2007* Written by: Daniel Knauf Charlie Knauf Art by: Jackson Guice "Haunted part 4" Plagued by the ghosts of his past, Iron Man continues his investigation into the tragedy in Omaha despite being pressured by the Commission on Superhuman Activities to close the case. But troubling questions remain unanswered. Who is really behind Gadget's murder, and what marked her for death? The only witness is a madman named Graviton.