OXFORD, Mich. (FOX 2) - The 15-year-old sophomore who opened fire at Oxford High School on Tuesday was charged as an adult Wednesday.Ethan Crumbley is charged with one count of terrorism, four counts of first-degree murder, seven counts of assault with intent to murder, and 12 counts of possession of a firearm while committing a felony in connection with the school shooting that killed four students and injured seven other people, including a teacher.Tate Myre, 16, Madisyn Baldwin, 17, Hana St.
Juliana, 14, and Justin Shilling, 17, were killed.RELATED: What we know about the victims of the Oxford High School shootingCrumbley was arraigned Wednesday afternoon and a not guilty plea was entered on his behalf.