Jaycee's Abductor: What Makes a Monster

The bittersweet reunion of abducted girl Jaycee Lee Dugard with her family touches on the worst fears of a parent and leaves us all shaking our heads as to how someone could commit such an act. Social psychologists have some answers.

Dugard, now 29, was reportedly abducted in 1991 when walking to her school bus stop in South Lake Tahoe, Calif. For 18 years, her alleged abductor Phillip Garrido, 58, and his wife Nancy, 54, kept Dugard isolated in a backyard encampment of tents and sheds, where her two daughters, allegedly fathered by Garrido and now 11 and 15, also lived. Known as "Creepy Phil" in his neighborhood, Garrido said God spoke to him through a box, according to news reports.

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Managing editor, Scientific American

Jeanna Bryner is managing editor of Scientific American. Previously she was editor in chief of Live Science and, prior to that, an editor at Scholastic's Science World magazine. Bryner has an English degree from Salisbury University, a master's degree in biogeochemistry and environmental sciences from the University of Maryland and a graduate science journalism degree from New York University. She has worked as a biologist in Florida, where she monitored wetlands and did field surveys for endangered species, including the gorgeous Florida Scrub Jay. She also received an ocean sciences journalism fellowship from the Woods Hole Oceanographic Institution. She is a firm believer that science is for everyone and that just about everything can be viewed through the lens of science.