Those were the words the gunman wrote in a chilling fax to ABC News, according to the network. The document purportedly from the Virginia shooter came after he gunned down WDBJ-TV journalists Alison Parker and Adam Ward, spurring a manhunt that ended when he turned a gun on himself as troopers closed in.

The shooter -- a former reporter for the Roanoke station -- is dead, but the investigation into Wednesday's attack is far from over. Authorities say the fax to ABC, the gunman's other attempts to reach out to the media and his social media posts just after opening fire could be key pieces of evidence as they try to pinpoint what led to the deadly shooting.

Franklin County Sheriff Bill Overton said authorities weren't sure about the gunman's motive, but are looking at his past employment at WDBJ as well other evidence, including the fax he allegedly sent to ABC News in New York.

"Many of you have gotten a lot of the correspondence, emails that had been sent out. It's obvious that ... this gentleman was disturbed in some way of the way things had transpired," and that "at some point in his life, things spiraled out of control," Overton said.