The investigation began when FBI agents were notified by MCPD about a 129-page "manifesto" written by Ye. In the document, Ye writes about committing a school shooting, and strategizes about how to do it…  
   
 … According to the documents, the person who received the book noted that the main character was Asian and transgender and had previously been hospitalized for psychiatric care. All of these things mirrored Ye's real life. The person ended up calling police and said they were worried that a school shooting was imminent