[rhizome]

Have you ever heard the statistic that there are over 200,000 unsolved murders in the past 40 or so years? In the U.S.? This means that there are a lot of serial killers out there -- one page estimates 2,000 -- not to mention the relatively-banal one-and-done murderers.

Police already rarely run DNA tests on existing convicts, so I'm fairly sure they would not view it as a prestigious apppointment to work all day every day to grind through several tens of thousands of new DNA tests just to upload them to GEDMatch...for a chance at a hit on someone who hasn't already been convicted, who isn't already scheduled to be executed, or who has already been executed.

Long story short: you're talking about something that is easy to ask, but is a massive undertaking.