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Extra: Remembering Colleen MacMillen

November 17, 2012 7:45 PM

Kevin and Shawn MacMillen discuss the emotional journey of wondering what happened to their sister, Colleen, who went missing in 1974, along the Highway of Tears. In Sept. 2012 -- 38 years after her disappearance -- they finally learned that her killer had been caught.

"48 Hours" explores mysteries, murders along the Highway of Tears
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