A missing link: Growing DNA databases help solve mysterious murders in Washington

Thanks to breakthroughs in science and growing databases of DNA, cold cases are starting to get cleared more often, sending shivers down the spines of predators who thought they would get away with it. It's also giving hope to the families of victims that they might actually get justice. Take the disturbing murder in 1995 of Patricia Barnes for example. Her nude boy was found in Kitsap County, Washington. She had been shot twice in the head. It was a case that stymied investigators for more than 20 years until Kitsap County Sheriff's Detective Mike Grant solved it thanks to DNA.

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