Breaking: I can report that the deceased mass shooter at Abundant Life Christian School in Madison, Wisc. is a 15-year-old girl named Natalie Lynn Rupnow.
She carried out the mass shooting in the school library, according to a source. She did not identify as trans.
The teen girl used the name "Sam" online and the username "crossixir." She had an extensive online obsession with school shooters and death, particularly the 1999 Columbine High School shooting. Rupnow was a big fan of the KMFDM rock band, which was also referenced by one of the Columbine shooters. (She often wore the shirt of the band.)
Rupnow's online friends identified the X account, which purported to belong to the shooter, soon after news broke of the shooting. The account's last post is of an "okay" hand symbol in the school's bathroom by the library minutes before the shooting.