A Las Vegas man accused of killing another at a bus stop allegedly ate the victim’s face as cops responded to the bloodied downtown scene. Colin Czech, 31, has been charged with open murder, according to jail records. It’s unclear if he entered a plea to the charge or retained an attorney to comment on his behalf. On Sunday, officers responded to a report of two men fighting at a bus stop, according to the Las Vegas Metropolitan Police Department. When they arrived, the victim was unconscious and bleeding from the head, said police. Responding officers allegedly witnessed Czech kneeling next t…