A US Army sergeant named Paul Thames, 29, has been arrested for beating a three-year-old boy in Waco, Texas. Thames is an active-duty soldier with the 1st Cavalry Division at Fort Hood. Police charged him with injury to a child. Thames allegedly hit the child after he refused to work on his ABCs. A neighbor’s Ring doorbell camera recorded the attack outside an apartment. The video shows Thames punching the boy repeatedly on his torso and back with "excessive force." It also shows Thames lifting the boy by the back of his neck and covering his mouth as the child cried. During police questioning, Thames said he had moved in with the boy’s mother a few months ago. He said the child would not practice the ABCs, so he took the boy outside to punish him. The mother was inside at the time and did not know about the incident. Police said the abuse was discovered only because of the neighbor’s video. Thames admitted he "went overboard" and said he was wrong. He also apologized to the child. The boy was taken to a hospital with neck pain, treated, and released. The US Army said it is working with police and called the behavior "disgusting." A spokesperson said this behavior does not represent the Army or the 1st Cavalry Division.