An 11-year-old Chicago boy claims an off-duty Chicago police officer beat him during a fight in a park on the city's South Side. That confrontation happened last weekend.  Now the Chicago Police Department's Office of Professional Standards is investigating the claims. This allegedly began as a simple playground disagreement between two boys. But Donna Moore says it led to her son having to make a trip not only to the police station but to the hospital for minor injuries. She says he received those injuries at the hands of an off-duty Chicago police officer. Donna Moore says her 11-year-old son is afraid to go out of the house ever since a confrontation at a playground in the 9400-block of S. Leavitt over the weekend. It was a confrontation that turned into an alleged attack by the father of another boy Donna's son had an argument with, a father who was an off-duty police officer. Corliss Vaughn was driving by and says she witnessed the incident and rushed out of her car. "I don't know what the young man did, but what he did did not deserve all those punches. He's just a young kid. This is a grown man punching a young kid," said Vaughn. Other witnesses suggest the officer was trying to detain the boy until uniformed officers arrived to handle the disagreement. That is not the way Donna Moore saw it. She says she arrived before the uniformed officers to see the man holding her son, who was scared. "He started beating me up, like she said, and doing like were doing a wrestling match," said the alleged victim. Ms. Moore says the man told her he was an officer and refused to release her son. "A grown man can come up on a child and beat a child and then hide behind a badge?" said Donna Moore, mother. [MORE]