Mia Walker is on her school swim team. Before practice, she changes into her swimsuit at a rec center locker room. She had no idea that for four months, a woman was secretly videotaping her and the other youngsters getting undressed. The camera was discovered by pure accident by Mia’s mother, Christina. Video obtained by Inside Edition shows Christina noticing the glare of a camera lens coming from one of the lockers. Who planted the camera? It’s hard to believe, but it was another mom.