Washington student's grandmother turned him in after reading concerning journal entries about his plans to kill people at his school. A student in Washington state was arrested Tuesday after his grandmother called authorities to report "upcoming and credible threats" of a plot in his journal to attack a high school after flipping a coin, officials said. The Everett Police Department said in a news release the grandmother contacted authorities around a. Authorities arrested O'Connor at the school, where he was found carrying marijuana and a knife.