Apparently it was another girl, Valeen Schnurr who was asked the question, and replied "yes." They asked her why, and she replied that her parents brought her up that way. Praying to herself that the killers would not shoot her again, she closed her eyes and waited. The killers walked away.
The News article says that one of the witnesses to initially tell the story about Cassie being asked about her belief in God was Craig Scott whose sister Rachel was among those killed in the rampage. He told investigators that he heard the exchange about God and thought it was Cassie’s voice that said “yes,” but he did not actually see who had said it. According to the article, Scott was later able to point to where the gunman was at that time that he heard the exchange, but that he indicated a table where a different student, Valeen Schnurr, had been hiding. Schnurr’s mother says Valeen was lying wounded on the library floor and was praying when one of the gunmen approached her and asked if she believed in God. The News article says she replied by saying, “Yes, I believe in God.” The gunman did nothing more and Valeen survived. The Salon article says Valeen was saying, “Oh, my God, oh, my God, don’t let me die,” when one of the gunmen asked her if she believed in God. She said “yes” and was then asked why. She said, “Because I believe and my parents brought me up that way.” Salon says that in the end, the investigators concluded that Valeen’s was the only encounter in the library where anyone was asked about God. None of those who thought the question had been asked of Cassie actually witnessed it, they only heard it and, it is suggested, heard Valeen’s voice, not Cassie’s.
https://www.truthorfiction.com/cassie/
There was at least one girl who didn't shrink from her faith that day. Perhaps Cassie Bernal did also. We don't know that, but we do know that Cassie had found God and amended her life thereafter. Which is apparently the message of the book she wrote about her daughter.
