Cold cases are being cracked with the help of ancestry sites 21:09

Finding a suspect based on their DNA alone used to be almost impossible: police could only search DNA databases of people who’d already committed crimes and been convicted. But the increase in popularity of online genealogy and DNA databases are changing what’s possible.

The Globe’s Colin Freeze has spoken to Canadian detectives who are using the same technique that caught the Golden State Killer to solve cold case crimes here in Canada.

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