Madison authorities investigate motive after pupil, 15, carried out deadly attack at Abundant Life Christian school

The 15-year-old girl who police say killed a teacher and a student and wounded six others before dying by suicide at a school in Madison, Wisconsin, reportedly left a manifesto that investigators are now reviewing.

Police identified Natalie Rupnow – who also went by the name Samantha – as the shooter late on Monday. A law enforcement source told CNN that Rupnow “had been dealing with problems and expressed some of those in writings, which they are now reviewing”.