High-powered Hollywood attorney Gloria Allred is representing the "traumatized" Rust crew member who called 9-1-1 after Alec Baldwin's fatal shooting on the set of his latest movie, and she's vowing to launch her own investigation into the tragedy.

As Breaking Celebrity News previously reported, script supervisor Mamie Mitchell phoned Santa Fe Fire and EMS in a panic last Thursday after two of her colleagues were shot while rehearsing a scene at New Mexico's Bonanza Creek Ranch.

Cinematographer Halyna Hutchins, 42, was killed, while director Joel Souza, 48, was struck in the shoulder but survived.

Allred told Fox News that her client, Mitchell, was "standing very close to Halyna Hutchins and the director, Joel Souza, when both Halyna and Joel were shot."

She said she and her colleagues at her Allred, Maroko & Goldberg law firm "have reason to believe" Mitchell was the first person to call 9-1-1, adding that her client was "a friend and close colleague" of Hutchins.

"She is devastated by the loss of her friend who was an extraordinary woman," Allred told the outlet in an email. "Mamie recently attended the vigil for Halyna and her heart goes out to Halyna's husband and son to whom she has spoken."