They left Wi-Fi enabled on their cell phones, which automatically connected to the school network when within range. IT staff then associated the log-ins with individual students - allowing them to be identified and caught. Original article (via Washington Post): "A black principal, four white teens and the ‘senior prank’ that became a hate crime"<p>URL: <a href="https://www.washingtonpost.com/graphics/2019/local/teen-graffiti-hate-crime-divides-maryland-high-school/?noredirect=on&utm_term=.78f736e73113" rel="nofollow">https://www.washingtonpost.com/graphics/2019/local/teen-graf...</a>