A man detained by U.S. Border Patrol agents allegedly spat blood and assaulted an agent, while he was being transferred to another vehicle. According to court documents obtained by Action 4 News, an FBI agent observed Alberto Mayen who was present in the U.S. illegally try to escape by twisting the arm of a U.S. Border Patrol agent. The incident happened at the Rio Grande City Border Patrol station. After allegedly twisting the agents arm, Mayen then fled on foot. When the agent caught up to him, a violent encounter begun. Mayen was told to stop resisting multiple times in...