Michael Brown, an 18-year-old man from Ferguson, MO, was shot and killed by local police in front of his grandmother's house on Aug. 9. The unarmed teen — a recent high school graduate who was reported to be starting college that week — was taken down by a series of bullets from one officer's gun, with witnesses telling KMOV that his hands were in the air while he was struck. Photos of his lifeless body went viral on Twitter late Saturday night, with many people comparing his tragic death to those of other African American teenagers Trayvon Martin and Jordan Davis. Though there are conflicting details surrounding what caused the incident (police reported that Mike "physically assaulted" the officer and tried to steal his gun, though Ferguson Police Chief Thomas Jackson declined to comment on what led to the shooting), there has already been lots of backlash and protests in the small St. Louis suburb as well as on the Internet. Here are four things you should know about the Mike Brown shooting: