When she was asked by the 911 dispatcher about whether she or Miglino pulled the gun, Hepner replied: "No, he pulled it on me and he's got it. He drove away," according to an audio recording of the call. Nearly hysterical, Hepner also mentioned to the dispatcher that he and her daughter were in "the middle of a horrible divorce."
"That's mind boggling," Miglino said today on "GMA." "I can't believe she's lying. ... Just listening to that [the 911 call], I'm like, 'Why would you want to do that to my son? Why would you want to hurt him for the rest of his life?'"
Investigators later recovered the gun, and found it had jammed. They said they believe that Hepner would have continued firing had the handgun not failed.
The audio of the incident captured on Miglino's iPhone video camera has been key to the investigation of the shooting. Fifty-eight seconds into the recording, three gunshots are heard. Then Miglino can be heard saying: "I can't believe you did that. I can't believe you did that … I can't believe you f**king shot me."
The bullets hit Miglino in the shoulder and rib cage. He was treated for his wounds at a local hospital and released but still has the two bullets in his body, he confirmed.
"Emotionally, it still bothers me because I can't believe it still happened," he said. "No one is a winner here. My son lost again. He lost his grandmother, and he lost his grandfather."
ABC News' Kevin Dolak and Suzanne Yeo contributed to this report.