Autopsy results unveiled late Monday are showing more details in the killing of 25-year-old Ahmaud Arbery. The autopsy showed Arbery was hit by three shotgun blasts. A video appears to show the last two shots, before Arbery staggers and falls face down.Gregory and Travis McMichael are accused of murder.The McMichaels told police they chased Arbrey because they believed he matched the appearance of a burglary