You recall incorrectly. Her religion was mentioned frequently, as was Cassie Bernal's famous declaration of faith (inaccurately, it turned out, but her Christianity was reported).
“IIRC, the MSM buried any mention of her religion.’
I can’t believe that you think the story was buried. It was one of the major stories of the Columbine shooting. There were several of the students that were members of a Christian Youth Group, and I occaisionally still see a story about some of them giving talks and lectures on Christianity and the Columbine tragedy. I think you need to work on your memory.