A mother has been hailed as a hero for turning in her own son who allegedly had plans to carry out a mass shooting at his high school on the anniversary of the Columbine massacre.

According to CBS News, the mother, who’s only named as Nicole, discovered detailed plans to shoot up College Park High School in her son’s journal.

It included times, specific firearms and explosives, locations as well as plans to kill his mother and her partner. It also included lines about wanting to ‘Kill everyone possible, fight to the death,’ and ‘kill self after maximum damage.’

When Nicole confronted him about it he said it was “just a story”, but police later arrested him on charges of felony harassment and threats to bomb or injure property

The mother also urged that her son was very depressed and needed help.