Duarte was attending the concert with her brother's girlfriend Ariel Romero, who was injured in the shooting, the Daily Breeze writes. 

Statement From University of Arizona President Robert C. Robbins:

"All of us in the University of Arizona community are saddened that Christiana Duarte, one of our graduates from this past May, is among the victims from Las Vegas on Sunday night. 

"Staff in our Dean of Students office and Life & Work Connections are reaching out to those who knew her, including her sorority sisters in Sigma Kappa.

"This attack is a terrible tragedy for hundreds of families, and it is a shocking and horrific event for all of us. I know I speak for the UA community in expressing our deepest condolences to Christiana's family and in asking for their privacy to be respected."

https://uanews.arizona.edu/story/statement-ua-president-death-christiana-duarte