Kensington Strangler

Christine Piacentini visits a makeshift memorial for her daughter, Nicole Piacentini.

Using DNA evidence and a huge push from area residents, Philadelphia, PA police arrested 21-year-old Anthony Rodriquez for strangling three women to death: Elaine Goldberg, 21, Nicole Piacentini, 35 and Casey Mahoney, 27.

Residents rallied after the women’s bodies were discovered in Nov-Dec., 2010 – creating a Facebook page to catch the killer. Police, fearing vigilantism, made haste investigating the case.