It took nearly 28 years for police in Prince George’s County, Maryland, to determine the identity of the man detectives say killed 50-year-old Sherry Crandell back in 1998.

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The case had gone cold until a few years ago, when the department turned to what’s known as “genetic genealogy” in the hopes of using DNA taken from the crime scene to look for new leads.

“Its effectiveness has led to the Department of Justice, basically expanding its grant programs so that local law enforcement can take advant

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