Rocio Guillen Rocha and her fiancé were in Las Vegas to celebrate a friend’s birthday, and the couple were at the concert when she was shot.
She was taken to a hospital but didn’t survive, her family said.
A resident of Anaheim, California, she leaves behind four children, including a son born just weeks ago.
She was an assistant manager at a California Pizza Kitchen restaurant — and she once struggled through what was once feared to be permanent paralysis, said her eldest son, Marcus Guillen, 18.
“She was paralyzed having my brother” years ago, Guillen told CNN. “She had a blood clot in her spine. The doctors said she would never walk again. She proved everyone wrong. She was able walk. After that, she ran half marathons.
“She did everything she could. She always fought for us. I want (people) to remember just how much a fighter she was and how much she worked and how much she provided for us.”
She is survived by her fiancé, Chris Jaksha, and her children: Marcus; Christopher, 13; Sofia, 1; and a 1-month-old, Austin.