48 Hours

To Catch a Stalker (16x34)

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In Shaker Heights, Ohio, just outside Cleveland, Ching L. Chang found a culturally rich and diverse neighborhood where he and his wife, Yoon Wah, could raise their four children. Penny, 15, was the youngest in the family. Growing up, her family says she was very neat, very talkative and very Americanized. She thrived in this affluent suburb, but no one could have predicted what happened. Correspondent Erin Moriarty reports