Webthese are some of the cold cases in canada that saw breakthroughs in 2023. But many crimes and disappearances remain unsolved. More than 2,500 adults. Webthis mystery was finally solved, thanks to forensic advances. Perhaps the same will happen for these 15 toughest cold cases. Webthe article on the messenger, which was published on september 26, comes after police used new dna technology to test at least five pieces of previously. Tammie sutherland explains what forensic. Webfor the first time, a canadian police force has confirmed it's using the same genetic genealogy technique that finally caught the suspected golden state killer to. Shock dna twist emerges. In 2021, boulder police department announced they’d begun to analyse nearly 1000 dna samples.