01 Oct 2015 Home » News » Did Roseburg Oregon Shooter Post Warning on 4chan? Did Roseburg Oregon Shooter Post Warning on 4chan? Posted in News By Editor On October 1, 2015 This chilling post that has been archived, appeared on 4chan last night before a shooter, now identified as 26-year-old Chris Harper Mercer shot and killed 10 people and wounded seven at Umpqua Community College in Roseburg, Oregon. Related Leave a Reply Cancel reply Your email address will not be published.Comment Name Email Website Notify me of follow-up comments by email. Notify me of new posts by email.