Robin Westman, 23, wrote chilling plans in a notebook that appeared to point to several trips to the church beforehand: ''I only saw old people and some mom-aged ladies, some with very young kids.'

The still unidentified shooter shot through stained glass windows as they unleashed the attack at Annunciation Catholic School's church this morning.

Two children aged eight and 10 have been killed and 17 more people have been injured.