FILE - In this Feb. 26, 2010 file photo, an apple, stuffed animals, and flowers are among the items placed at a growing memorial to slain teacher Jennifer Paulson across the street from Birney Elementary School in Tacoma, Wash. When the economy tanks, school shootings rise, unlike other violent crime, a new study finds. A multi-disciplinary team of researchers at Northwestern University analyzed data from 379 shootings in schools, not just mass shootings or gang involved ones, between 1990 and 2013 and found an interesting correlation between changes in national and local unemployment rates and how frequent the shootings happen. (AP Photo/Ted S. Warren, File)
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