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The bomb killed William Walker, 68, in his garage in Fort Moses, Wash., in 2008.
Just 10 hours later, and a few miles away, a similar bomb killed Javier Adame, 53.
“The same person constructed both bombs,” said Grant County Undersheriff John Turley. “They were sophisticated.” The bomb that killed William was hidden in a battery charger, while the other was disguised as a police radio. Detectives have obtained DNA samples from three unnamed male relatives of William, and hope to find a match with DNA taken from the bomb materials.
All three relatives were attending a family gathering hosted by William when the bomb exploded.