A Colorado teen who was arrested last month for allegedly planning to commit a mass shooting at her former middle school owned a copy of “The Communist Manifesto” — and blasted former President Donald Trump as a “con man” in her own writings, authorities said.

Lilly Whitworth, 19, wrote a detailed manifesto and possessed floor plans of her intended target before she was busted on March 31 for making threats to various schools, including Timberview Middle School, which she once attended, according to an arrest affidavit obtained by news station KRDO.