Maryland high school student arrested after authorities discovered a 129-page document detailing school shooting plan, police say. A Maryland high school student was arrested and charged with threat of mass violence Wednesday after police say they discovered evidence revealing the teen had plans to commit a school shooting.Authorities discovered a 129-page document they say was written by 18-year-old Alex Ye, the Montgomery County Department of Police said in a news release Thursday.Authorities learned of the writings following an exchange Ye had via Instagram messaging with an unidentified person who felt a school shooting was “imminent,” according to the teenager’s arrest warrant. The unidentified person knew Ye from an inpatient treatment at a local psychiatric facility, the warrant says.Ye referred to the writings as “his memoir,” which begins with a disclaimer that it is a work of fiction, the arrest warrant says.“In the document, Ye writes about committing a school shooting, and strategizes how to carry out the act. Ye also contemplates targeting an elementary school and says that he wants to be famous,” police said in the news release. A search warrant obtained by investigators “led to internet searches, drawings and documents related to threats of mass violence.”