Browse this interactive gallery of the young female victims, both found and still missing, involved in the 'West Mesa Murders' of 2009.
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Dateline wires the home of a volunteer, Jenny, from top to bottom with hidden cameras. Then she called repairmen to her house for a simple problem we created as a test with Jenny's pool. NBC's Chris Hansen reports.
The victims of 'West Mesa'
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The missing women of 'West Mesa'